Scales of x 1.05, y 1.05 and z 1.00 are needed for my printers. See "Materials and methods" below. After printing, add a 70 mm of M6 screw rod and an M6 nut. Double-nut may be useful to fasten a rod to the printed object. Use this winder slowly (around 60 rpm) and *safely*. You can wind sewing threads on spools with this thread winder attached to your home sewing machines. winder.FCStd is source code made by FreeCAD 0.18. MD5 (winder.stl) = 5c8307784940b3fd36032e430736233e MD5 (winder.FCStd) = 4d5c781762b735a35f4c75fc88099b42