For future success in the hobby, you might start working on your deadstick landings once you get everything fixed up. They are pretty easy on a trainer and can be simulated by just cutting the engine to idle and gliding in. If it doesn't look good the first time, you still have power to go around.

Blue locktite will hold those screws in next time. I don't use it on head bolts or backplates because it can make them look tight enough when they actually aren't, but for carbs and mufflers it'll prevent lots of headaches.