Parametric Y-Axis Back Brace for 8", 10" or 12" Prusa i3v

**Update Rev5 2/11/2016**
I corrected a mirror problem that pgx3d spotted. I also added 8" & 12 test parts & updated them so the bottom side of them should line up with the back of the Y-axis Wood Plate.

While working on a plastic design of the Y-axis backplate for the i3v this idea came about after talking with my friend voodoo28 and his problem with the 12" version flexing. I like making parametric designs, so I went ahead & made this design so you could make a brace for either the 8", 1