I am looking at putting smart tabs on my boat. Thing is, I beach my boat and run in very shallow water at times. While I never hit things at high speed, sometimes I will drift and touch bottom. I'm assuming the tabs stick down below the hull, so after the motor, they would be exposed and could be damaged. Can they take a few taps here and there or should I be worried about them hitting at all? Also, I'd assume they can be adjusted up completely, but how quickly can this be done? Thanks, for any replies, Nick.