And I learnt on a raptor 50 nitro, there's no issue really, I can set a goblin 770 up for a novice. The issue is when it goes wrong it goes really wrong, there's a guy on Heli freak who used a TDR as a trainer and apart from one crash at the start did very well. Helis are very differant to any other branch of RC in the fact that they are not self stabilised. They are inherently unstable and without correction will crash very quickly. It's the same for any Heli. The only issue with a large Heli is if it hits you or someone else.