I just received an old Ace SeaMaster which I believe has never been flown. (Storage has, however taken a toll). The stab was way off square; got that lined up. It is outfitted with an old OS FS series 4 stroke which I think is a .52. Now comes the time to try to fly. any advice? I am the builder, my son the flyer. He has been flying a Kadet Senior which I set up with floats, airleons, and flaps and .46 engine. I am hoping this plane will allow him more capacity for aerobatics. This is my first experience with a 4 stroke. Any ideas on setting it up?

Does anybody recommend stabilizer reinforcement?