ED80 ST80 Piggyback tube rings

Telescope mounting rings for telescopes with a 90mm and 100mm outer tube diameter, and a middle bracket to piggyback mount a 90mm on a 100mm. It's all designed to bolt together with 25mm m6 bolts.

I recommend a minimum of 4 walls and top/bottom layers for strength. I printed with 5 walls, 5 top/bottom layers and 20% grid infill.