X-idler Mount Plate and related parts for Makerfarm i3v 10"

There is a newer version of this design that has an idler assembly that allows you to adjust the tension on the X-axis belt on the idler side. http://www.thingiverse.com/thing:878023

This is a plastic version of the Makerfarm i3v 10" X-idler wooden plate. It is probably the same plate for the 8" & 12" version. There is a 3 wheel and a 4 wheel version. The eccentric spacer holes are countersunk, so you do not need a washer where the lock nut attaches. I personally put a washer between the loc