for the weak frame thing, I have this Walkera heli that I crashed a number of times. I ended up using CA hinge material for airplanes and making a doubler for stress points. It made it many times stronger. JUst float some CA on the stress point and lay a CA hinge on it. Hit it with some kicker and its tough as nails. Negligable weight gain, too. Plus you can re enforce only where you need it with out having to buy a new frame. A pack of CA hinges is like a couple of bucks from Tower. Enough to do a dozen helis.