Someone uploaded a very similar one to this which I largely copied from. I can not find it. if someone finds it let me know and I will add a link.
I built the nut and totally rebuilt the shaft and heavily modified the Vertical so it can all be printed on a 150x150 bed together.
3 top 3 bottom 3 Perimeters (1.2mm) 25% grid both ways. print flat as loaded no support or raft needed. Use M4 or M5 bolts 8-10mm with T/Hammer Nuts or directly into the end of extrusion threaded (Ender 2, Tevo Michellangelo etc..)