My girlfirend sister, a wood worker, asked me for this thing.
An easy way to keep 4 pieces of angular cutten wood in site with a strop belt.
I've taken out my OpenSCAD skills and made this piece, easy printable in place without support (just need a good bridge calibration) and four pieces at the same time.
Just print in place.
I've tweaked Symplify3D to make an overextrusion and obrain a better shells bonding.