There are reducer plates available so you could use a 57mm instrument in
an 80mm hole.Â* Check this out:

https://www.aircraftspruce.com/catal...hoCH1AQAvD_BwE

This could double your options.

On 11/1/2018 10:15 AM, ProfJ wrote:
Hi Folks,

Like it says - if you have a basic club-type audio vario, let me know...

Regards
Jon

--
Dan, 5J