I am just finishing a Falcon Trading Company Ready (high wing trainer type) with their floats. This thing goes together real easy, the instructions are photo illustrated and these airplanes fly really good. Plus the thing is made of plastic therefore no worries about getting it wet.

You just attach the floats to the gear mounts and replace the nosewheel strut with the included one. No incidence or center of gravity to worry about. Couldn't be simpler.