Re: Tower wiring
Guess I woulda run the wires thru the tubing before/during the tower assembly to save a lot of difficulty. But it appears that ship has sailed...
So now you must either use fish tape, which will be quite challenging to get around bends and find the tiny little holes you drill, and it will probably require you to drill larger holes than would otherwise be necessary. Or maybe it's not too hard for you to disassemble the tower part-way? You can probably just remove and disassemble one leg of the tower for the project to run your wires thru it, and removing a leg might save you a lot of wire fishing headaches. Pretty sure that's what I'd do if I were you...
I think you'll just have to run sort of a "jumper" of plastic tubing as shown in Brick's pic above, out of the tube, around the hinge, and then back into the tubing at each hinge that is in the way on your wiring route. It wouldn't be nearly as clean looking, but simply zip-tying the wire to the outside of the tube at the hinge areas could also work. Heck, you could ziptie the entire wire to the outside of the tower. BUT....that would be both lazy AND cheezy looking.
Not sure if you ever fold this tower or not, but obviously you need to think this through as well to make sure wires don't get pinched or pulled in the folding process.
At every location you run a wire thru a hole drilled in the side of the tube, install a rubber grommet. If you don't do this the wire insulation may eventually cut and short out the wires.