RE: g2 head speed
I don't think so - I had to look at a blow-up pic of the CNC G2 at Xheli.com to put my CNC head and tail together [:@]! Your best bet is to try and remember the steps you take in pulling it apart. The head does not sport "thrust" bearings like most helos - just regular bearings. As far as reprogrammng the ESC, it can be complicated. Some cards are only made for a particular ESC, so check before you buy. I don't know what type you have, but you can go to any Hobby store and purchase an ESC programming card (costs around $10.00) or order on the Internet. Where did you get your bird from? Call their customer service and see if they can offer you any help.