I still find threading cam buckles without a picture in front of me to be one of my most challenging skills. I can do a long no mask swim, at 130 feet, in cold water. No worries. I can shoot a bag in a silty quarry without stirring up any muck. Easy as pie. But, threading the d**n cam buckle still requires thought for some reason.They'd sold it to me threaded incorrectly (came that way from the manufacturer?), showed me how to do it right, and I never had a problem after. (This was well before http and youtube, and I don't think I even got a manual with the thing.)