The design was all done in OnShape and then printed out on my Prusa MK3s+ using a wood filament type. The intention was to use magnets to connect the lights together, and then stain the wood to give a unique light.
The white plexiglass didn't cascade/black enough of light though and you could easily see the location of each LED.
An early thought was to try using some nickel ribbon to create pressured tabs that would connect (sort of like your AA's connect the negative in your remotes) when snapping together. Finding the right length, proved difficult though, and I just wired them through the holes for prototype 1.