I sometimes have to cure parts that are too large for the turntable in the curer.

This is a simple prop to hold the parts at an angle so that they fit the turntable, and get a good exposure.

Printed from PLA, three walls, five top and bottom surfaces, 10% infill. It needed 10 grams of filament and took about an hour on a BBL A1.

I don't know how the PLA will react to UV exposure, but for a few minutes occasionally, it doesn't really matter.