Sidewinder Z carriers

I never liked the original Z axis mounting system so I was happy to see Control3D take this on and improve it! The Control3D version is working great for me, but I decided to try a few improvments:
1. Captured 5mm nuts on thhe outside rollers to clear the extrusion. (Use with 35mm bolts)
2. Change the inner roller tension cam mount to a single side. To keep the inside roller flat on the extrusion.
3. Move some material around on the top to increase the max Z height.