Yes, and it worked beautifully. It gives it just a bit more diameter to seal it up. There is def. a learning curve to those things. I have not used one on a small dia. curved surface. I have put them through trash cans with no problems though. The RK2s use a ton of them, and they are getting very popular with many equipment manufacturers.
I think the RK2s use a different brand, though. The Uniseals are tougher than the ones RK2 uses, IMO. I havent used RK2 stuff since about 2001, though...