Affixing anything to anything in such a way that it can be removed and repaired is a process that takes forethought.
With my early decision to implement a vector bot as the “shiftable weight”, it was imperative to find a way to attach panels to the outside of the sphere without inhibiting the wheels.
So, glue, right? Epoxy? I want these panels to be removable so I can make inevitable repairs and upgrades.
Bolting through the inner sphere was out. I can’t use magnets since the large magnet would just rip panels off with the dome.
I decided to use t-nuts. I would need to print spacers to make up the 3/16 or so difference between the panel circumference and the sphere circumference. I want to keep that gap for wires when I hook up the shell LEDs.
It took me a few tries to get the spacer thickness just right. I settled on 2.6mm.