Obsession 15 UC secondary mirror cover

Print is simple and will probably work with any reasonable settings. Print flat side down for both parts. I printed mine with a 0.6mm nozzle at 0.3mm layers in black Overture PLA. The threads are a little tight intentionally so they don't wiggle lose in storage or transport, but because the inner threads are on the slotted tube it can always push together a little bit, so you should never have a problem getting it to fit together.

Slide the slotted half over the secondary from above, so that the braces slide into the slots. Then screw the bottom half onto it from below. It takes about two full turns once you get it started.

That's it! Enjoy your protected mirror.