update purchase, do BOM in readme

README.md

@@ -173,6 +173,50 @@ The quality of your work on the Shopbot will directly influence the quality of w
 ## Gcode Basics
 - may it RIP
 
+# Bill of Materials
+
+## Controller
+
+ - [TinyG](https://github.com/synthetos/TinyG/wiki)
+ - [buy on Adafruit](https://www.adafruit.com/product/1749)
+
+## Power Supply
+ - [24v 14.6A switching PSU](https://www.omc-stepperonline.com/power-supply/350w-24v-146a-115230v-switching-power-supply-stepper-motor-cnc-router-kits-s-350-24.html)
+
+## Motors
+ - [4x NEMA 23 57x57x56 w/ 6.32mm Shaft w/ D w/ 400 Steps / Rev](https://www.omc-stepperonline.com/hybrid-stepper-motor/nema-23-bipolar-09deg-126nm-1784ozin-28a-25v-57x57x56mm-4-wires-23hm22-2804s.html)
+
+## Tooling
+ - 1/8" O-Cutter Upcut - https://www.bhid.com/itemdetail/HARVEY%2051908 or Onsrud PN 65-013 
+ - 1/4" O-Cutter Upcut - https://www.bhid.com/itemdetail/HARVEY%2044916 or Onsrud PN 65-023
+ - 1/2" 90deg Chamfer Endmill - https://www.bhid.com/itemdetail/NIACUT%20N76595
+ - 1/16" O-Cutter Upcut - https://www.bhid.com/itemdetail/HARVEY%2051162
+ - M5 Tap  (McMaster)
+
+## Hardware
+ - SHCS M5x12 (Motor Mounting) - 91292A125 
+ - SHCS M5x20
+ - SHCS M5x30 (Rails Mounting) - 91292A192 
+ - Washers M5 - 93475A240
+ - Set Screws M3x6 (Pinion Safety) - 92605A100 
+
+## Material
+ - Rails / Structure etc: 3/8" x 24x36" of HDPE or ABS (TBD)
+ - Glide Blocks: 3/8" x 12x24" Acetal (Delrin) Sheet
+ - Pinions: 1" x 2x6" Acetal (Delrin) Bar 
+
+## End Effector Showdown
+ - A Router 
+ - A Laser Diode (haute)
+ - A 3D Print Head (also haute)
+  - Heated Bed ?
+ - Ceramic Printer
+ - Pick-and-place-ish
+ - Drawing
+ - Camera / Scanning
+ - Cutting
+
+
 # Footnotes
 
 1. [Five Axis](http://ekswhyzee.com/index.php/project/tinyfive/), [Metal Laser Cutter](http://ekswhyzee.com/index.php/project/mako/), [and here](http://3dfablight.com/), [Dual Head 3D Printer](http://openassemblies.com/index.php/fdm4md/), and [Ongoing Robot Arm Adventure](http://openassemblies.com/index.php/rsea/)   

purchase-parts.md

-## Controller
-
- - [TinyG](https://github.com/synthetos/TinyG/wiki)
- - [buy on Adafruit](https://www.adafruit.com/product/1749)
-
-## Power Supply
- - [24v 14.6A switching PSU](https://www.omc-stepperonline.com/power-supply/350w-24v-146a-115230v-switching-power-supply-stepper-motor-cnc-router-kits-s-350-24.html)
-
-## Motors
- - [4x NEMA 23 57x57x56 w/ 6.32mm Shaft w/ D w/ 400 Steps / Rev](https://www.omc-stepperonline.com/hybrid-stepper-motor/nema-23-bipolar-09deg-126nm-1784ozin-28a-25v-57x57x56mm-4-wires-23hm22-2804s.html)
-
-## Tooling
- - 1/8" O-Cutter Upcut
- - 1/4" O-Cutter Upcut
- - 1/2" 90deg Chamfer Endmill
- - 1/16" 2-Flute Endmill w/ at least 5mm DOC
- - M5 Tap  
-
-## Hardware
- - SHCS M5x12 (Motor Mounting) - 91292A125 
- - SHCS M5x20
- - SHCS M5x30 (Rails Mounting) - 91292A192 
- - Washers M5 - 93475A240
- - Set Screws M3x6 (Pinion Safety) - 92605A100 
-
-## Material
- - Rails / Structure etc: 3/8" x 24x36" of HDPE or ABS (TBD)
- - Glide Blocks: 3/8" x 12x24" Acetal (Delrin) Sheet
- - Pinions: 1" x 2x6" Acetal (Delrin) Bar 
-
-## End Effector Showdown
- - A Router 
- - A Laser Diode (haute)
- - A 3D Print Head (also haute)
-  - Heated Bed ?
- - Ceramic Printer
- - Pick-and-place-ish
- - Drawing
- - Camera / Scanning
- - Cutting