I've just upgraded from a Honwave T30ae to a T40ae.
I looked at some of the launching wheels available and watched some in use.
Most I've seen are quite flimsy and get in the way when fitted.
I found Beachmaster Wheels, from New Zealand on the net and decided to buy a set of removable wheels. At 200 Euros + import tax of around £45, they have been the best purchase I have made for my Rib.
Well made, strong and detachable using simple lug system, fitted myself in an hour, simple. You leave them on during use as they fold up out of the way.
Check out their website Beachmaster Boat Launching Wheels
and check out the customers photo's. They took two weeks to get here.