This is a design for a very simple SWB bent.

2 straight main tubes. Presently, this is designed around 1.125 round tubes, because thats what I have laying around. 54" long, which provides just enough length for a person of 5'10".

Basically, the whole thing is 'chainstay'. A direct shot from the rear axle to the 'BB' shell.

USS or ASS TBD. Leaning towards USS, but this is still in flux.

130mm wide at the rear end, to accomodate the rear der, and just touching at the front end. Each tube is angled approx 1.5 degrees to provide the separation at the back end. Final angle TBD after initial assembly, but 1.5 degrees is just about right.

Only one 'weird' cut, for the head tube. And depending on final rim size, and head tube angle required, even this could be a 90 degree cut. With a 26" rear, and a 20" front rim, and depending on how the rear dropouts are built, a 72 degree head tube angle just happens to 90 degrees to the main tubes.

With a 2-piece seat, it could be fully adjutable for hip angle and overall lean.