I've been using BOSL2: https://github.com/revarbat/BOSL2 https://github.com/revarbat/BOSL2 There's a whole fillet / chamfer library using masks and such, but I

I've been using BOSL2: https://github.com/revarbat/BOSL2 https://github.com/revarbat/BOSL2 There's a whole fillet / chamfer library using masks and such, but I've found that you can go a looong way with just basic shapes that start out chamfered/filleted, and unioning and differencing them.