About this 3D model

I'm trying to upload a Thing-a-day this February.makerblock.com/2011/02/makerblock-thing-a-day/I'm trying to create an auto-homing Cupcake CNC in an attempt to upgrade my Cupcake into a Thing-O-Matic. This "start.txt" file will allow your Cupcake to autohome. This code was essentially copied from the stock Thing-O-Matic autohoming code, but has been altered to exclude the Z homing (since I haven't designed an endstop for that axis) and does no heating of the extruder or heated build platform.Day 7: Cupcake XY autohoming GCode http://www.thingiverse.com/thing:6200Day 6: Cupcake CNC Optoendstop Trigger for X Minimum thingiverse.com/thing:6191Day 5: Things That Cannot Be Unseen. thingiverse.com/thing:6097Day 4: Extruder to Stepper mounting plate. thingiverse.com/thing:6106Day 3: A shelving unit bracket. thingiverse.com/thing:6001Day 2: A mirror bracket. thingiverse.com/thing:6000BONUS THING: A Helen Weight. thingiverse.com/thing:6024Day 1: A bathroom hook. thingiverse.com/thing:5999