RE: R2 HOBBIES CAT
I have an orange "hull only" that I will build. Mine was very nicely made. Sharp sponson edges and of decent quality Fiberglass. It is polyester not epoxy.
Others in another thread specifically for this cat, have said that the quality they received was not so great.
They are about $90-$100 delivered I think, so you have options with other similar hulls.
Lastly, this hull is designed specifically for single drive as you cannot fit twinn motors in the tight sponson space.