Thanks Crash, that helped alot - just curious, how does the foldable configuration work, wouldn't it pull back in flight if your going forward, sorry this is my first tricopter always been using the quadcopters with sturdy fixed arms. I see you can fix them, but having it foldable would be cool. On the talon tricopter there is a locking mechanism, but David looks like he just folds it back and then has a stopper for pushing it back forward.