I have built ft simple cub and ordered power pack b, it came with 2 9x4.5 props, broke them both fast, the motor is 2212 1050kv , I bought 2 9x6 props that are flexible, so maybe they won't break as easy while I'm learning to land, my question is will the 9x6 prop be alright on my motor with 35 amp esc? And could someone suggest some hard to break props till I learn to land?