another que. if i happen to buy a new tower hobbies os .46 axbb engine can u still fly it with the required 10X6 apc prop? and how many tanks of the 5% 20% fuel would it need to go through? i have 10 and 18 percent still in a gallon size and need to know what to do about it? is it safe to use it up after the break in period? i dont know too much about break ins if you can help me on that thanks!