Handwires are finicky, but the easy repair seems like it will make things easier to live with. I am sure there are several cold joints in this one (I really am still not very good with the iron), but I caught several structurally problematic ones during the build, and since then nothing has come loose. I kept things vertically compact enough that 3/8"/10mm seems enough to avoid any issues with shorts, but I could probably use a roll of kapton tape.
Yeah in my build I have a short length of micro USB cable with a usb connector on one end and a 4 pin socket on the other that attaches to a usb breakout board mounted on the edge of the bottom plate. This let me place the usb port in a comfortable location while putting the teensy in a logical place in the case.
Anyway, one of the joints connecting the cable to the 4 pin socket broke. Super easy fix. Other than that it’s been remarkably problem free, and as you say, even if I run into issues into the future, repairs are very easy (unless I ever have to replace the controller… that could be more of a pita).