Embroidery hoop V2

This is the second version (and more sizes) of my previous embroidery hoop design https://www.thingiverse.com/thing:4257753

The screw is improved with better grip and a body that tapers outwards to make tightening and untightening easier. It also has a larger thread that seems to last longer than the previous one. It's still not the strongest way to do this and I will eventually make a version that uses a metal screw when I get tired of printing these.

For best results print the screw with at least 3 shells. I normally print them at 100% infill too, but it might not be necessary.

The rings can be printed with 2 shells and 15% to 20% infill.