It's pretty simple: two gussetted brackets with. Drawer slides between them. I made the donuts out of pine, and I'll probably make taller ones to help better clear the bass. Here are picks as is, and the build documentation starts halfway down in this build thread: http://www.tdpri.com/threads/here-comes-another-one-or-two.650038/ Excuse the mess, I'm in get it done mode, trying to ride the momentum I have right now. I had to cut the corners off the base as it was contacting the guitar body in the deeper recesses. It's a little junky looking but fully functional.