ok so that would be the C-hub that broke,, i drove mine 2-3 packs without there even being a screw in there and i couldnt break it lol.

Good thing about "metal" as you call it, actually aluminum,, is they wont break, the bad part is they may bend and bending them back just weakens them and since that area will no longer give flex the stress now gets sent out to other parts, i think for what you paid for aluminum parts you could have bought a crap load of the plastic ones and just replace them as needed but i dont think that area usually breaks, what happend with yours sounds like it just happend to get hit just right that it broke, normally i think thats uncommon.

If you have the bad servo just call them now they will send you a new one b4 yours breaks (or thats what i was told anyhow) then again see my post on the HexFly servo they send as a replacement,,, its junk!!! same crap as the original. So you maybe better off to spend 30 bucks and get you a decent Hi Tech 645Mg servo or spend a lil more and get a good savox servo.

As i said earlier about the ESC you may just have to make room to see the led's and take your time trying to program it, if you were able to program some of it you should be able to program everything else.

Good luck with it hang in there you wont regret it im sure if you just get a few of the kinks worked out.