A telemaster should be great! If you do that, power it in the top end of the recommended engine range and it should go really well. There are generic plans available for building floats for any size plane. They scale according to fuse lenght and plane weight.

Here's a few pages

http://flyinglindy.homestead.com/skisandfloats.html
http://www.geistware.com/rcmodeling/...oats/index.htm


If you did floats, I'd recommend foam floats. Without hollow hulls, they can't leak, and even after a crash, your plane will stay afloat so long as it's attached to the floats. Built up balsa or hollow fibreglass floats can and do sometimes leak, sinking planes to the bottom.

Flying boats (sorry 'bout your seawind, btw...) are easier to fly off water than float planes, I think. a float plane's CG is several inches above the water, and that means if you flub a landing, the plane is likely to nose over or cartwheel. You can slap a flying boat in pretty abruptly, and since the CG is INSIDE the float, it'll usually handle it pretty well.

Either way, flying off water isn't really all that different from flying off land, just the pieces get wet when you crash... And you need a boat to get it back when it does!

Cubs aren't really unstable, but they're not a trainer. They're either high-winged aerobats (espec. clipped wing variants) or they're floaters needing a bit of a "scale" piloting touch. Most people you hear saying they're touchy or difficult to fly are trying (often in vain) to dissuade a newbie from using one as a trainer. They are find second (and beyond) planes, and look great on floats. The telemaster would be an easier to fly plane, but can also be a real floater (in flight, that is..).

I'd look into a seamaster. Remember, though, especially with seaplanes, power is great, but weight is even more important. If you had a .40 size flying boat, it'd fly better with a 46. Better still with a small case 51 of similar weight. But the bigger block .61 might be enough extra weight to ruin her water handling, especially take-off performance. So, hit the top end of recommended engine size with a light version of that size, and don't be tempted to install 3d power!