Practice with them at altitude to see what trim changes they are going to cause and how much drag they will generate. Safety in altitude!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Got the idea? Practice the basics. Takeoffs and landings. Boring? Who cares? I don't want to hear that. Quit playing with rocks and paratroopers for a while. You need to master them NOW!!!!! Before you move on to more difficult planes. Don't want the 4* to be a one flight plane do you? [:@] It could happen. Sorry if I sound harsh. Trying to help.