90mm side-by-side telescope tube mounting rings

thingiverse

Tube rings mount two telescopes side-by-side with a 90mm outer tube diameter. This setup works for some ED80/ST80 imaging scope/guide scope combinations, but some ED80s have a larger 100mm tube diameter. You'll need a large print bed to accommodate this project. Print two top and two bottom pieces - the handle is optional, but it adds convenience and stiffness. The components fit together with M6 bolts, while the handle features recesses for two captive hex nuts. I've uploaded Sketchup files along with STLs for your reference. PLA is not recommended if you plan to store this in a hot observatory or shed. ABS is likely the best choice, but its large size makes warping difficult to prevent. PETG should work, though it's more flexible than ABS/PLA and might introduce flexure between scopes - I haven't tested it yet. Carbon fibre filaments are an ideal option due to their stiffness. Printer Settings: Printer: Hictop Prusa i3 (3DP-17) Resolution: 0.2 Infill: 30% Notes: I used four shells for added strength and 30% honeycomb infill. The handle requires supports for the captive nut fittings.