I know some of you guys shoot them, and they are way cheaper than an NAP scizzor rest, and make me feel better than shooting a questionable drop-away. Do they work perfectly all the time, or do the mechanisms fail every so often? Will it slow down your arrow speeds? I already got so much junk on my string I can't even shoot 20 yards without having to compensate 6-8''. So I would love to try one if somebody can assure me I won't lose much speed. And what is the big rib-looking peice on the thing for? Thanks for the info!