This Y-AxisTensioner is a modification of http://www.thingiverse.com/thing:367760. I modified it to be a direct replacement for the existing bearing mount of my RepRap G3D (Prusa i3 design from Gadgets3D).
I changed the following from the original design:
width to accommodate a single bearing (instead of 2)
a recess in the screw plate to keep it in position
a hole that allows the embedded nut to be pushed out (removed)
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