I posted the finished bedroom towers on a.b.p.w.

362 seperate pieces of wood including 136 floating tennons. Where floating
tennons were not used stub tennons and slots were cut to connect all other
pieces and for the frames of the drawer fronts. door fronts, and side
panels.

No screws except to attach the slides, drawer fronts and handles, door
hinges and latches, and to attach the bottom feet to the main cabinet.