About this 3D model

This is a riff on http://www.thingiverse.com/thing:91998, although this piece was designed from scratch in Sketchup. This piece holds two 8mm rods at 49mm apart; the piece is designed to mount along one length of OpenBeam. I didn't include the little guides on the backside that center the piece in the t-slot; I wanted to make sure this would print without issue first. UPDATE, this printed out without issue but it's a pain in the butt to fit the 8mm rods - I'll update this file if I get around to slightly enlarging the holes. (I'll also add a little meat on the top of the holes, they're only a layer or two thick at the moment)