Summary My Z axis movement was to close the frame on the top of my i3 clone. So designed arms that would not interfere with the x carriage movement. I used parts from http://www.thingiverse.com/thing:920183 and http://www.thingiverse.com/thing:1306326 to complete the assembly. The onshape link is https://cad.onshape.com/documents/dfc9e917ca53cbb3461ac532/w/8e5b1d4496900ee4749ac852/e/c80ce77be2081ed3ba671e23 if you want to tinker. The filament guide uses #8-32 sae screws and nuts, it's what i have on hand. However M4 screws will fit in the hole the nuts are slightly smaller. Print Settings Printer: Cookie Bot Rafts: No Supports: No Resolution: .2 Infill: 20%-60% Notes: I like to use at least 1.2mm walls/top/bottom layers.