On ZS-WEC, my KR2, I converted all the automotive size instruments into aircraft size (2.25 inches) instruments.
All I had to do was to make square flanges of the correct size out of aluminium 2.8mm sheets (I dreamt of a thicker, plastic sheet, without finding one), then cut out a hole in the middle at the correct automotive hole size, slip the instrument in, and voila! To secure the instrument to the flange, I epoxied each instrument to its new flange, but quite frankly, the C-clamp would have worked too. I have PowerPoint templates for these flanges, if anybody wants them. Just print them on paper (ideally a sticker label), then cut the instrument holes with your favorite hole saw or fly cutter, then drill the mounting holes, then cut with a hacksaw. Serge Vidal KR2 ZS-WEC Tunis, Tunisia Ron Freiberger wrote: [If it's AIRCRAFT, it's more expensive. And 2.25 inch diameter, and nice looking. If you go to PepBoys, and buy one for your CAR, it'll be cheaper.]
