Remixed it because I fly in a very very muddy area, and I wanted to, if possible, keep mud off the receiver.

My Rx is actually a GR-12L, but a buddy wanted a case for his GR-16, so I uploaded both.

The idea is that the Rx will slide in like into a matchbox. The case is perfectly wide to accept a battery strap across it to keep your RX in place. The single hole on the GR-12L case is because there's only a single antenna. If there's a demand I can also upload an STL for GR-16 shortened to match the GR-12's length with both antenna holes.

MiniKossel

No

Yes

0.2mm

25%

Note that these are my settings. You might be able to get away with not using supports, but double-check that your printer can handle the angles leading to the antenna holes without trouble.