A combination of https://www.thingiverse.com/thing:996378 and the adapter nut from https://www.thingiverse.com/thing:3877287 to make a basic stand for the Plugable 250x USB Microscope that uses the original flexible arm.

due to height it prints pretty fast (about 3 hours on my ender 3) I used a raft, but It probably wasn't required.