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the 0.65 tolerance model worked well with my home made Chinese prusa i3. Printed in 4 hours 50mm/s 0.3 layer height, 15% infill. The screw needed lots of tender love to get it to crack but it eventually broke free and worked. It is weak and the 0.3 layer height makes it a poor thread. I have printed another screw at better resolution and higher infill just to have a better overall part, it didn't break! If my shoddy prusa can do it anyone can!