Dubro 2268 Effector and Carriages

This is a remix of Johann mini kossel effector and carriages to use 6/32 threaded bolts that come with the Dubro 2268.
http://shop.dubro.com/p/6-32-heavy-duty-ball-links-2-pkg-1

Goals:
1. Use the Dubro 2268 instead of Traxxas 5347 ball links
2. attach lock nuts from the outside using a single 6-32 threaded rod.
3. get maximum range of motion.
4. clear belt movement zone of nuts.

I found that for the carriages, the original design (locknuts on outside, extra cone-shaped spacer