ORIGINAL: lettucelord

Hey i have a blade CP, it flew fine for a little while, but now when you add full throttle, it just sits there on the ground until you start to increase the trim, then it puts the pitch in but because of the pitch increase, the engine bogs down and the only way to control it is to pull the throttle out, but then it resets again and wont lift off. I thought it just needed a bit of adjusting so I took it to my hobby shop, and the heli expert sat there for an hour and a half trying to fix it. He replaced a couple bent parts in the rotor head, checked all the servos and everything. He had no idea what was wrong with it. I called Horizon, and the tech guy told me over and over that it had to be the servos, but the thing is, each servo works fine by itself. I want to get this heli going again, so I was wonderin if any of you guys had any suggestions
THanks