I modified the original design so that the 4 pcs. in the machine. it can be fixed with a screw, or I combined the two parts.. Required parts: GT2-6mm T20 splined wheel 8mm hole/3 pcs. GT2-6mm inside 852mm/1pc. 688ZZ ball bearing/1pc. M3X50 screw/1pc. M3 nut/1pc. The 4 pcs. factory screw space approx. screw half a cm. longer
The author remixed this model.