They were just a PITA. I got tired of replacing outerwears that got melted from the heat from the pipes, the fear of them falling off(never did though), having to stay away from water so they didn't get wet, hated cleaning them all of the time. With the 2:1 I've had no issues at all & it's a synch to maintain....running the UNI filter & outerwear...same outerwear that came with it I'm still using after a couple years. I just think the 2:1 is an all-around better system than the clamp-ons.
Do me a favor and measure the part where the 2:1 goes on the carbs i think my 30's will be to big, they are right at 2" on the filter side.