This is a very simple airplane, as simple as the come. There is no need for fancy or expensive instruments. I plan to keep mine as simple as possible, since it’s likely to be registered E-AB, I’ll have to have airspeed indicator, altimeter, and compass. If I end up going with the 1/2 VW engine then I’ll also have oil temp, oil pressure, volt meter (all come as a package for $25 at auto parts store). Then a dual CHT/EGT gauge that I already have, but is not required (maybe I’ll even omit it?). For tach I’ll use a simple tini-tach as they are cheap and accurate.