add bone sizes

README.md

@@ -28,11 +28,9 @@ DEX runs a [squidworks](https://gitlab.cba.mit.edu/squidworks/squidworks) contro
 #### Hardware Documenting TODO
 - BOM, McMaster
 - CAD shuffle and export
-
-#### P1 Assembly
-- fixturing, doc and print
-- idler and 125t drive at hearth
-- N23 backside mount
+- fixturing !
+- N23 mount, others (?)
+- print some coupons ft. natural PLA ... git ready to test party
 
 ### BOM
 
@@ -74,7 +72,6 @@ DEX runs a [squidworks](https://gitlab.cba.mit.edu/squidworks/squidworks) contro
 - laser, 3dprinter
 - soldering iron for inserts
 - arbor press is nice, but not necessary
--
 
 ### Dependencies
 
@@ -98,7 +95,9 @@ fixturing moves / top to bottom
 
 ## Testing Notes
 
-Use the D683 ASTM Dogbone - normally Type 5
+Use the D683 ASTM Dogbone - normally Type 5.
+
+![dogbones](images/astm_d-638_bonesizes.jpg)
 
 ## Controller Desires