cool, another chopper guy
just my opinion=I do not care for the blade it dosent feel right to me but get what you like
remember practice, practice, practice! and dont let the heli intimidate you--like it did me
metal parts dont flex as much and there are a few other reasons, make pliot feel better, Bling, etc. etc.
opinion again=upgrades arent needed unless you are doing hardcore 3D but again get what you want or like
get a experianced heli pilot to help you it will make things much easier on you, your bird, and your wallet!