I've used many times gyros on ailerons, in particular when it's a jet which tends to 'wobble' (like an Avonds' Rafale) or which can handle the slowest possible speeds and high AOAs (SpiderJets F-16,... of course ! )

I've always been most pleased with the ACT gyros - but never used them in Heading Hold mode.

Can somebody give me some feedback on using a gyro on elevator ? Does it make sense ? Or is it really overkill ?

Nicolas.