I pretty much just build boats anymore. Haven't turned sticks into planes in a long time. Being boats, the socket heads are on the exterior. And the nuts and washers are inside. Small hardware and really small tight spaces or insane angles that won't afford the use of a ball driver or socket. I also have cannibalized a couple of my kids "magnetix" toys for the rare earth magnets inside them. They are 6mm and fit perfectly inside the tubing. They have several ounces of pull and will hold more hardware than you need to hang. Unfortunately they are attracted to everything ferrous in their proximity. Another thing I have done for years is to use cheap hollow core doors for layout tables for my wood kits. Perfectly flat. Push pins are easy to insert and hold. Can be cut to necessary size and store vertically with ease. Cheaper than a workbench and great for apartment dwellers. Keep rattling my brain. I'll keep recalling tidbits to share. Thanks for the input.