If you find the Red Snappers are too tight, you can try clamping them onto a slightly larger diameter piece of dowelling - this will stretch them a little and make them easier to put on. I bought a 48 inch piece and left one piece of the snapper on it for a week or so to stretch it out a bit, switched to another piece etc until I had three or four stretched pieced. Then they were much easier to clamp on.
I did this with my Leadergrips - and it made a big difference, so it would likely work for the Red Snappers as I think they're similar.