IF that is the one I think it is you have to shuck the mechanism out the the body and pull the battery holder.

The bottom gear has a set screw and the upper gear has two screws that I think are on top of the gear and screw into the hollow shaft. (Those are fun to put back.) Watch for thrust washers on the shafts.

I think the rotors will will pull out of the the top now after unhooking the links. You should be able to get at the swash at this point.

It isn't difficult and if you get everything back in place it should fly. My experience has been the motors don't last long.

My 2 cents.

RT