I have recently gotten interested in sidemount diving. I brought a Nomad wing and reconfigured my transpac to use it. I've been playing with the set up in the quarry this winter using either aluminum 80's or steel 100's. I am planning to take a sidemount cave class later this summer and was wondering if it's better to keep on playing in the quarry with the SM set-up or wait until the class. I've received different advice on this ranging from: don't get into bad habits that the instructor will have to break you of; to why even bother taking a class - just play with the gear in the quarry until it works right for you and then take it into the cave. BTW, I should mention that I am full cave certified at present.