I finished the CAD of the project, which is pretty much the whole thing except the assembly. It’s a very simple design. The main body clamps on to the desk/table. The end cap gets glued to the dowels on one side. The dowels then go through the holes in the main body. Then, the phone tray part gets glued to the other side. I chose not to make it clamp onto the phone and swivel so there are less potential failure points and I can keep my phone in any flat position.