I'm curently flying my stirdy birdy 2 , I want to transition to my arrow trainner. Should I replace the os.fx.25 w/ evolution .46 on the sturdy bird to get use to the greater power? The other option ist to leave the .46 inthe arrow trainner and start flying it? I'm getting good at takeoff and landing in a small grass area by farm field I fly at. The takeoff landing strip is about 35 yards, is that enough for the arrow trainner? how diffrent from sturdy birdy will it be?