diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 000000000..5edeeae78
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "pyembroidery"]
+	path = pyembroidery
+	url = https://github.com/inkstitch/pyembroidery
diff --git a/lib/extensions/convert_to_satin.py b/lib/extensions/convert_to_satin.py
index 1eae69b1b..dd5a9bc28 100644
--- a/lib/extensions/convert_to_satin.py
+++ b/lib/extensions/convert_to_satin.py
@@ -3,7 +3,6 @@ from shapely import geometry as shgeo
 from itertools import chain, groupby
 import numpy
 from numpy import diff, sign, setdiff1d
-from scipy.signal import argrelmin
 import math
 from copy import deepcopy
 
diff --git a/messages.po b/messages.po
index d2fefa2ae..72f7e6d03 100644
--- a/messages.po
+++ b/messages.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2018-08-09 14:52-0400\n"
+"POT-Creation-Date: 2018-08-16 15:39-0400\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -25,40 +25,70 @@ msgstr ""
 msgid "Automatically routed fill stitching"
 msgstr ""
 
-#: lib/elements/auto_fill.py:33
+#: lib/elements/auto_fill.py:34
 msgid "Running stitch length (traversal between sections)"
 msgstr ""
 
-#: lib/elements/auto_fill.py:38
-msgid "Underlay"
-msgstr ""
-
-#: lib/elements/auto_fill.py:38 lib/elements/auto_fill.py:43
-#: lib/elements/auto_fill.py:54 lib/elements/auto_fill.py:60
-#: lib/elements/auto_fill.py:70
-msgid "AutoFill Underlay"
+#: lib/elements/auto_fill.py:35
+msgid ""
+"Length of stitches around the outline of the fill region used when moving"
+" from section to section."
 msgstr ""
 
 #: lib/elements/auto_fill.py:43
-msgid "Fill angle (default: fill angle + 90 deg)"
+msgid "Underlay"
 msgstr ""
 
-#: lib/elements/auto_fill.py:54
-msgid "Row spacing (default: 3x fill row spacing)"
+#: lib/elements/auto_fill.py:43 lib/elements/auto_fill.py:52
+#: lib/elements/auto_fill.py:68 lib/elements/auto_fill.py:79
+#: lib/elements/auto_fill.py:89
+msgid "AutoFill Underlay"
 msgstr ""
 
-#: lib/elements/auto_fill.py:60
+#: lib/elements/auto_fill.py:49
+msgid "Fill angle"
+msgstr ""
+
+#: lib/elements/auto_fill.py:50
+msgid "default: fill angle + 90 deg"
+msgstr ""
+
+#: lib/elements/auto_fill.py:65
+msgid "Row spacing"
+msgstr ""
+
+#: lib/elements/auto_fill.py:66
+msgid "default: 3x fill row spacing"
+msgstr ""
+
+#: lib/elements/auto_fill.py:76
 msgid "Max stitch length"
 msgstr ""
 
-#: lib/elements/auto_fill.py:67
+#: lib/elements/auto_fill.py:77
+msgid "default: equal to fill max stitch length"
+msgstr ""
+
+#: lib/elements/auto_fill.py:86
 msgid "Inset"
 msgstr ""
 
-#: lib/elements/auto_fill.py:78
+#: lib/elements/auto_fill.py:87
+msgid ""
+"Shrink the shape before doing underlay, to prevent underlay from showing "
+"around the outside of the fill."
+msgstr ""
+
+#: lib/elements/auto_fill.py:97
 msgid "Expand"
 msgstr ""
 
+#: lib/elements/auto_fill.py:98
+msgid ""
+"Expand the shape before fill stitching, to compensate for gaps between "
+"shapes."
+msgstr ""
+
 #: lib/elements/element.py:232
 #, python-format
 msgid "%(id)s has more than one command of type '%(command)s' linked to it"
@@ -68,31 +98,63 @@ msgstr ""
 msgid "Fill"
 msgstr ""
 
-#: lib/elements/fill.py:18
+#: lib/elements/fill.py:19
 msgid "Manually routed fill stitching"
 msgstr ""
 
-#: lib/elements/fill.py:23
+#: lib/elements/fill.py:20
+msgid "AutoFill is the default method for generating fill stitching."
+msgstr ""
+
+#: lib/elements/fill.py:29
 msgid "Angle of lines of stitches"
 msgstr ""
 
-#: lib/elements/fill.py:34
+#: lib/elements/fill.py:30
+msgid ""
+"The angle increases in a counter-clockwise direction.  0 is horizontal.  "
+"Negative angles are allowed."
+msgstr ""
+
+#: lib/elements/fill.py:45
 msgid "Flip fill (start right-to-left)"
 msgstr ""
 
-#: lib/elements/fill.py:39
+#: lib/elements/fill.py:46
+msgid ""
+"The flip option can help you with routing your stitch path.  When you "
+"enable flip, stitching goes from right-to-left instead of left-to-right."
+msgstr ""
+
+#: lib/elements/fill.py:54
 msgid "Spacing between rows"
 msgstr ""
 
-#: lib/elements/fill.py:48
+#: lib/elements/fill.py:55
+msgid "Distance between rows of stitches."
+msgstr ""
+
+#: lib/elements/fill.py:68
 msgid "Maximum fill stitch length"
 msgstr ""
 
-#: lib/elements/fill.py:53
+#: lib/elements/fill.py:69
+msgid ""
+"The length of each stitch in a row.  Shorter stitch may be used at the "
+"start or end of a row."
+msgstr ""
+
+#: lib/elements/fill.py:78
 msgid "Stagger rows this many times before repeating"
 msgstr ""
 
-#: lib/elements/fill.py:84
+#: lib/elements/fill.py:79
+msgid ""
+"Setting this dictates how many rows apart the stitches will be before "
+"they fall in the same column position."
+msgstr ""
+
+#: lib/elements/fill.py:112
 #, python-format
 msgid ""
 "shape %s is so small that it cannot be filled with stitches.  Please make"
@@ -111,87 +173,112 @@ msgstr ""
 msgid "\"E\" stitch"
 msgstr ""
 
-#: lib/elements/satin_column.py:31 lib/elements/stroke.py:45
+#: lib/elements/satin_column.py:32 lib/elements/stroke.py:52
 msgid "Zig-zag spacing (peak-to-peak)"
 msgstr ""
 
-#: lib/elements/satin_column.py:37
+#: lib/elements/satin_column.py:33
+msgid "Peak-to-peak distance between zig-zags."
+msgstr ""
+
+#: lib/elements/satin_column.py:43
 msgid "Pull compensation"
 msgstr ""
 
-#: lib/elements/satin_column.py:45
+#: lib/elements/satin_column.py:44
+msgid ""
+"Satin stitches pull the fabric together, resulting in a column narrower "
+"than you draw in Inkscape.  This setting expands each pair of needle "
+"penetrations outward from the center of the satin column."
+msgstr ""
+
+#: lib/elements/satin_column.py:55
 msgid "Contour underlay"
 msgstr ""
 
-#: lib/elements/satin_column.py:45 lib/elements/satin_column.py:52
-#: lib/elements/satin_column.py:57
+#: lib/elements/satin_column.py:55 lib/elements/satin_column.py:62
+#: lib/elements/satin_column.py:71
 msgid "Contour Underlay"
 msgstr ""
 
-#: lib/elements/satin_column.py:52 lib/elements/satin_column.py:70
+#: lib/elements/satin_column.py:62 lib/elements/satin_column.py:86
 msgid "Stitch length"
 msgstr ""
 
-#: lib/elements/satin_column.py:57
+#: lib/elements/satin_column.py:68
 msgid "Contour underlay inset amount"
 msgstr ""
 
-#: lib/elements/satin_column.py:63
+#: lib/elements/satin_column.py:69
+msgid ""
+"Shrink the outline, to prevent the underlay from showing around the "
+"outside of the satin column."
+msgstr ""
+
+#: lib/elements/satin_column.py:79
 msgid "Center-walk underlay"
 msgstr ""
 
-#: lib/elements/satin_column.py:63 lib/elements/satin_column.py:70
+#: lib/elements/satin_column.py:79 lib/elements/satin_column.py:86
 msgid "Center-Walk Underlay"
 msgstr ""
 
-#: lib/elements/satin_column.py:75
+#: lib/elements/satin_column.py:91
 msgid "Zig-zag underlay"
 msgstr ""
 
-#: lib/elements/satin_column.py:75 lib/elements/satin_column.py:80
-#: lib/elements/satin_column.py:85
+#: lib/elements/satin_column.py:91 lib/elements/satin_column.py:100
+#: lib/elements/satin_column.py:111
 msgid "Zig-zag Underlay"
 msgstr ""
 
-#: lib/elements/satin_column.py:80
+#: lib/elements/satin_column.py:97
 msgid "Zig-Zag spacing (peak-to-peak)"
 msgstr ""
 
-#: lib/elements/satin_column.py:85
-msgid "Inset amount (default: half of contour underlay inset)"
+#: lib/elements/satin_column.py:98
+msgid "Distance between peaks of the zig-zags."
 msgstr ""
 
-#: lib/elements/satin_column.py:118
+#: lib/elements/satin_column.py:108
+msgid "Inset amount"
+msgstr ""
+
+#: lib/elements/satin_column.py:109
+msgid "default: half of contour underlay inset"
+msgstr ""
+
+#: lib/elements/satin_column.py:146
 #, python-format
 msgid "satin column: %(id)s: at least two subpaths required (%(num)d found)"
 msgstr ""
 
-#: lib/elements/satin_column.py:144
+#: lib/elements/satin_column.py:172
 msgid ""
 "One or more rails crosses itself, and this is not allowed.  Please split "
 "into multiple satin columns."
 msgstr ""
 
-#: lib/elements/satin_column.py:151
+#: lib/elements/satin_column.py:179
 msgid "satin column: One or more of the rungs doesn't intersect both rails."
 msgstr ""
 
-#: lib/elements/satin_column.py:151 lib/elements/satin_column.py:153
+#: lib/elements/satin_column.py:179 lib/elements/satin_column.py:181
 msgid "Each rail should intersect both rungs once."
 msgstr ""
 
-#: lib/elements/satin_column.py:153
+#: lib/elements/satin_column.py:181
 msgid ""
 "satin column: One or more of the rungs intersects the rails more than "
 "once."
 msgstr ""
 
-#: lib/elements/satin_column.py:194
+#: lib/elements/satin_column.py:222
 #, python-format
 msgid "satin column: object %s has a fill (but should not)"
 msgstr ""
 
-#: lib/elements/satin_column.py:198
+#: lib/elements/satin_column.py:226
 #, python-format
 msgid ""
 "satin column: object %(id)s has two paths with an unequal number of "
@@ -202,36 +289,48 @@ msgstr ""
 msgid "Satin stitch along paths"
 msgstr ""
 
-#: lib/elements/stroke.py:30
+#: lib/elements/stroke.py:31
 msgid "Running stitch length"
 msgstr ""
 
-#: lib/elements/stroke.py:36
+#: lib/elements/stroke.py:32
+msgid "Length of stitches in running stitch mode."
+msgstr ""
+
+#: lib/elements/stroke.py:42
 msgid "Bean stitch number of repeats"
 msgstr ""
 
-#: lib/elements/stroke.py:37
+#: lib/elements/stroke.py:43
 msgid ""
 "Backtrack each stitch this many times.  A value of 1 would triple each "
 "stitch (forward, back, forward).  A value of 2 would quintuple each "
 "stitch, etc.  Only applies to running stitch."
 msgstr ""
 
-#: lib/elements/stroke.py:51
+#: lib/elements/stroke.py:53
+msgid "Length of stitches in zig-zag mode."
+msgstr ""
+
+#: lib/elements/stroke.py:64
 msgid "Repeats"
 msgstr ""
 
-#: lib/elements/stroke.py:71
+#: lib/elements/stroke.py:65
+msgid "Defines how many times to run down and back along the path."
+msgstr ""
+
+#: lib/elements/stroke.py:89
 msgid "Manual stitch placement"
 msgstr ""
 
-#: lib/elements/stroke.py:71
+#: lib/elements/stroke.py:90
 msgid ""
 "Stitch every node in the path.  Stitch length and zig-zag spacing are "
 "ignored."
 msgstr ""
 
-#: lib/elements/stroke.py:102
+#: lib/elements/stroke.py:124
 msgid ""
 "Legacy running stitch setting detected!\n"
 "\n"
@@ -260,17 +359,17 @@ msgstr ""
 msgid "Please choose one or more commands to attach."
 msgstr ""
 
-#: lib/extensions/convert_to_satin.py:29
+#: lib/extensions/convert_to_satin.py:28
 msgid "Please select at least one line to convert to a satin column."
 msgstr ""
 
 #. : Convert To Satin extension, user selected one or more objects that were
 #. not lines.
-#: lib/extensions/convert_to_satin.py:34
+#: lib/extensions/convert_to_satin.py:33
 msgid "Only simple lines may be converted to satin columns."
 msgstr ""
 
-#: lib/extensions/convert_to_satin.py:55
+#: lib/extensions/convert_to_satin.py:54
 #, python-format
 msgid ""
 "Cannot convert %s to a satin column because it intersects itself.  Try "
diff --git a/pyembroidery b/pyembroidery
new file mode 160000
index 000000000..fe7609dc5
--- /dev/null
+++ b/pyembroidery
@@ -0,0 +1 @@
+Subproject commit fe7609dc59efb15f6a27d0ff7d82ac2ce7f6be53
diff --git a/requirements.txt b/requirements.txt
index 8d487a2cb..8fbea7cd9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-pyembroidery >=1.2.12, <1.3.0
+./pyembroidery
 backports.functools_lru_cache
 wxPython
 networkx