Summary

I liked the idea of the y-lock and the original was good, but I like a little "fancier" so I tweaked it up a bit. Made the latch stronger, added the Printrbot logo, and added a second mount hole giving you positioning choices. Hope you like it.

Instructions

The STL is in MM. Load and print- works fine even with a .1 (10%) infill.

After you print, you might like to color the logo with a permanent ink marker (I used black marker on my clear print).

Use one of the two holes with the existing bolt on the y carriage frame. You can decide if you wan the y pulled in a bit further which on my Simple XL gets the y carrige extruder end all the way over the print bed and therefore better protected (I think).

A good picture of approximately how this should be mounted is here:
http://thingiverse-production.s3.amazonaws.com/renders/0e/5b/83/17/ee/20140202_094255_preview_featured.jpg

Printrbot Simple y-lock redesigned