I designed this using FreeCad to fit my Oceanic Maxview compass module. It is printed in TPU, with supports, and 4 wall loops. The fit is very tight, but the module can be fitted into the holder by spraying the holder with a window cleaner and using a butter knife (or other similar object) to slip the holder over the compass. Be sure to align the index mark on the compass with the holder's index mark in the viewing window.