On Tuesday, November 6, 2018 at 1:44:31 PM UTC-6, wrote:

The idea of unpacking a brand new, beautifully cut panel and discovering my favorite instrument doesn't clear something by a few mm is daunting.

Chip Bearden

That is where we step back from the Sawzall and go to the palm sander. :-) "That plastic case doesn't need to be that thick. I will just sand a little off of there." I have seen winter varios with two of the four installation tabs sanded off and that whole side of the case flush with the OD of the back part of the instrument. I have an L-Nav that had to get a top, back corner of the case "smooshed" a bit.

Yes, initially make from something cheap for test fitting if you can. And be aware of corner radius on the panel. Otherwise, be prepared to modify instruments.

PS: I bought a panel for our club 2-33 and the mounting screw pattern on the 57 mm cutouts does not match those on the FSG-71M I was going to install.. Grrr....