|O Scale Version|
Here is the initial design for the O Scale Schoolhouse Globes. That 4.539mm/0.179″ dia stud was just eyeballed in place and can easily be modified if needed. The 2.947mm/0.116″ dia hole is much the same – just a bit over the .7mm minimum wall size for FUD. The HO versions .. a 1/16″ hole was large enough for the NANO LEDs.
Ngineering.com has HO 15″ Moon Hub Caps. That is 0.172″. I don’t know what the ID of these is .. and here is what I am thinking.
I need to order HO 15″ Moon Hub Caps, NANAO LEDs, #38 wire and 0.018″ tubing. Rework the O scale globes to fit those hub caps .. have them printed .. and make up some ‘kits with bits’