While it is not exactly a seaplane, I owned a Senior Telemaster. Due to very light wing loading, I would not land. I mixed in flaperons and DID NOT LIKE THEM AT ALL!!!!!!
You lose too much aileron control. Remember how we are supposed to have differential ailerons. More up than down. Do flaperons and you get full down on one aileron, and slight up, if any on the other as you try to control the plane. Not good. If you need flaps, my vote is make flaps and put on separate channel. I eventually cut the aileron and created flaps and was glad I did.
My two cents.
Twinman