You may have created a problem by saying that you want something scale. There just aren't any full scale aerobatic float planes.

Problem number two; scale aerobats like caps, extras, edges and especially yaks, in 40 size tend to be too heavy to start with and adding floats makes them nasty tip stallers.

The best 40 size aerobatic float planes I've seen were 1)Cermark Graduate; 2)Goldberg Tiger II; 3)Great Planes/Hobbico Kaos, none of which are scale, although 1 and 2 are "scale-like".

I personally love the Pacific Aeromodel Knockabout, which is a stand off scale Piper Cherokee, but it uses a Clark Y airfoil and is not as good at precision outside maneuvers as the fully symmetrical examples above.

Regardless of your choice, make sure you use the lightest floats you can. to keep the wing loading down. Hobby Lobby's glass floats are about the lightest, and tough enough for snow. Foam cores like Planefunfloats can be light if you go easy on the finish, but you will need glass on the bottom for snow.

Above all else, do not use Gee Bee floats. If you don't already know about them, do a search.

Jim