About this 3D model

I made this to fix the y axis on my Replicator 2. The motor uses a 5.5mm nut you need to loosen to fix the calibration when your not printing circles correctly. Also fit in regular hex screwdriver. Which is for this video. http://www.youtube.com/watch?v=l1FWj-ZHEVA&list=UUyP94yNLVV7V33hfxZOGmMg This tool fits my holder. As seen in the picture. http://www.thingiverse.com/thing:281132