Working out the model for the nightstand in openscad. I think I might spend some of this rainy day trying to figure out a way to draw mortice and tenon joints using difference. I figure if you can difference one module against another you might be able to pass 2 modules into another module and have the output module be the two modules with one having a mortice and the other a tenon. This should work for both through tenons and internal tenons as long as the modules intersect only where the joint goes