Reinforced Mendel Bed Supports

One of the parts of the bearing assemblies in the Y-Axis carriage supporting the heated bed on my RepRap Mendel broke after a few months of fatigue.
Blogged about it here: http://engineeringourfreedom.blogspot.com/2011/10/first-part-to-break-on-my-reprap-mendel.html

This thing reinforces all the parts with those little plastic square beams that are supposed to hold the bolts that support the printbed, by both adding a small triangle of support material to one side to act as a cantilever and