Squashed frog replacement for repraps: parametric , printable (Q47982)

This is one more element that used a big "vitamin" (non printed part)in my reprap that i wanted to replace. The squashed frog is the part that is underneath the Y axis platform, and to which the belt as well as the bushings/bearings rolling on the rails are attached. The initial version was cut manually from plexiglass, but due to my lack of good quality tools/workspace, while it worked , it certainly would not have won prizes for quality ! So i decided to design a printable version, that had to : *be mechanically resistant enough *be relatively fast to print *be made of more than one part since it needed to be as big if not bigger than the maximum print size *have mounting point for the bushings as well as the belt clamps So this is the solution i came up with: *it is made of 3 parts , two of which are identical *it requires 4 nuts and bolts to be assembled *the inner holes with roundings enable the parts to be strong yet not use too much plastic *it is relatively fast to build and easy to assemble *it works well ! I have yet to test it with a heated build platform but i am not too worried, because if the printed bushings of people using a hbp don't melt, then there is no reason for this to melt :) Very important : it uses the great bolted pla bushings by Griffin Nicoll available here : http://www.thingiverse.com/thing:7157