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.Parameters on the .scad file can be changed to suit your frame. Make sure the offset is large enough so that the rod will not get hit by the effector. The inlcuded .stl file has a 25mm offset. Printed with 25% honeycomb infill. More if you want it stiffer still. Allen caps for mounting for each bracket: 2x M3x8 for mounting on extrusion 1x M3x16 for the clamp 3x M3 nuts