diff --git a/docs/software/TODO.md b/docs/software/TODO.md
index a7d85dcf..1649250d 100644
--- a/docs/software/TODO.md
+++ b/docs/software/TODO.md
@@ -84,10 +84,13 @@ You probably don't care about this section - skip to the next one.
  
 eink:
 
+* DONE check email of reported issues
+* DONE turn off vbus driving (in bootloader)
 * new battery level sensing
-* measure current draw
+* current draw no good
 * DONE: fix backlight
 * DONE - USB is busted because of power enable mode?
+* test CPU voltage? something is bad with RAM (removing eink module does not help)
 * test that board leaves bootloader always
 * test USB - works in bootloader
 * test LEDs
diff --git a/platformio.ini b/platformio.ini
index aeab4f65..742bc6db 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -9,13 +9,14 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [platformio]
-;default_envs = tbeam
+default_envs = tbeam
 ;default_envs = tbeam0.7
 ;default_envs = heltec
 ;default_envs = tlora-v1
 ;default_envs = tlora-v2
 ;default_envs = lora-relay-v1 # nrf board
-default_envs = eink
+;default_envs = eink
+;default_envs = nrf52840dk-geeksville
 ;default_envs = linux # lora-relay-v1 # nrf52840dk-geeksville # linux # or if you'd like to change the default to something like lora-relay-v1 put that here
 
 [common]
@@ -33,6 +34,8 @@ default_envs = eink
 extra_scripts = bin/platformio-custom.py 
 
 ; note: we add src to our include search path so that lmic_project_config can override
+; note: TINYGPS_OPTION_NO_CUSTOM_FIELDS is VERY important.  We don't use custom fields and somewhere in that pile
+; of code is a heap corruption bug!
 ; FIXME: fix lib/BluetoothOTA dependency back on src/ so we can remove -Isrc
 build_flags = -Wno-missing-field-initializers
   -Wno-format 
@@ -40,7 +43,7 @@ build_flags = -Wno-missing-field-initializers
   -DHW_VERSION_${sysenv.COUNTRY}
   -DHW_VERSION=${sysenv.HW_VERSION}
   -DUSE_THREAD_NAMES
-  -DTINYGPSPLUS_OPTION_NO_CUSTOM_FIELDS
+  -DTINYGPS_OPTION_NO_CUSTOM_FIELDS
 
 ; leave this commented out to avoid breaking Windows
 ;upload_port = /dev/ttyUSB0
@@ -74,7 +77,7 @@ lib_deps =
   https://github.com/meshtastic/arduino-fsm.git#2f106146071fc7bc620e1e8d4b88dc4e0266ce39
   https://github.com/meshtastic/SparkFun_Ublox_Arduino_Library.git#31015a55e630a2df77d9d714669c621a5bf355ad
   https://github.com/meshtastic/RadioLib.git#07de964e929238949035fb0d5887026a3058df1a
-  https://github.com/meshtastic/TinyGPSPlus.git#9c1d584d2469523381e077b0b9c1bf868d6c0206
+  https://github.com/meshtastic/TinyGPSPlus.git#f0f47067ef2f67c856475933188251c1ef615e79
   https://github.com/meshtastic/AXP202X_Library.git#8404abb6d4b486748636bc6ad72d2a47baaf5460
   Wire ; explicitly needed here because the AXP202 library forgets to add it
   SPI