We have used them on various bows over the years. With the vertical feather rests, they will react differently with a heavy narrow carbons than with a lighter and fatter wood arrow. It is possible to compress them when shoot split and they will compress more with a heavy narrow arrow. The metal Hoyt works really nice with bows cut past center, but with aluminum arrows that are a bit dirty they can make noise on the draw. If you are shooting arrows that are on the verge of being too stiff an elevated rest can help. If you shoot three under the distance that nock has to be raised may be less. I helped a fellow tune his recurve for three under, the bottom string nocking point ended up being just 3/16" above the feather rest. If one gives some acknowledgement to the arrow position in ones sight picture it makes very little difference for aiming, other than you may get cleaner arrow flight and more arrow speed.