Thanks for the replies. I was checking the thrust/weight and The .75 with a seems it might be good with floats. Water has a way of sticking the plane down, and I have not ever found that I had too much power with the float planes I have. So the .90 would seem even better. I just don't want to overpower it. But what the hey, if one guy can put a Evolution 1.00 in it, then the .90 should do alright.
SuperTiger, here I come.
Anyone with any thoughts about if I should reinforce the firewall?