Just leave it...install the Os max. you're going to have to learn how to land a brick eventaully.
I flew mind with a .46 mag, The .40 os max should have more power.
I actaully had more fun with it and progess faster. i wasn't afraid of destroying it.
I mean do you go inverted a couple of feet of the deck with your cub ?
Do stall truns or tail slide. you can practice doing flat spins on it.
You can fly it on windier days too. it'll actaully just hover in some good head wind.lol