Kossel Mini Cross-brace Bracket

I love my Kossel Mini because it's really fast. So fast, the top frame shakes like a jackhammer. To eliminate excessive shaking, I made these brackets to mount cross-braces to stiffen the frame.

I wanted to use 15mm extrusions but they're too expensive just to be used for bracing, instead I used cheap 3/4 inch curtain rods. Not very pretty but the frame is really sturdy and the violent shaking has been eliminated.

Fits 15mm extrusions on 600x240 Kossel Minis. OpenScad file included for your customization.
Update: error in .scad file corrected, removed % symbol in //rod hole.