Yep - It's the pucker factor all right. On my sim I can hover close to the ground and do a perfect rolling circuit. In real life the pucker factor goes off scale and suddenly those hovers and rolling circuits are not so easy. On my sim if I make a mistake I push the red button for another go. In real life I count the $$$ value in my mistakes and save up to do it all over again. I agree, dont ever kid yourself by thinking you can emulate the success of your sim to that in real life. It's def pucker factor 10/10. Having said that - maybe start out with a smaller 40 - 60 size nitro plane and work your way through. It may save you some heart ache and money along the way.. Good luck.