Updated version of the Y-Axis Brackets. Added Case Lip.

I've updated Chuck Murrays Y-Axis Idler Brackets (http://www.thingiverse.com/thing:36446) - I couldn't find a thread on here where it was originally discussed, just the wiki entry to the thingiverse things, so apologies if this post is in wrong place.

The stock ones on my SD3 have small 'lips' on them to grab against the frame which assists in keeping them square and preventing twisting on the case. Chuck's originals didn't have these and I found mine twisted a bit when I bumped them etc.

So I imported them into Sketchup and added the lips then created a pair of STL files for printing out both sides of the brackets in one print - as the overkill versions aren't ambidextrous anymore due to the lips.

I'm currently using the overkill lipped versions and they work a treat.

You can find them at http://www.thingiverse.com/thing:79737 along with the sketchup file. Let me know if I screwed anything up.