Anet A8 X Belt Tensioner

X belt tensioner for Anet A8. This is a remix from https://www.thingiverse.com/thing:1683070, which uses 3d printed screws with knob instead of metal ones. I suggest to print this with 0.1 layer height for a good fit of the screws.

Update: X_tens_main_9mm_hole.stl has a 9mm large hole for wider idler.