No idea where this post should be, but help would be greatly appreciated.

ok i've had a plane for almost 2 years now and it hasent seen one flight. the problem originally was being able to afford what was needed but now im not a student i have been able to get what was needed. anyways my problem now is the electrics. the elevator uses two servos connected to a y lead, connected to an extension lead(about 1 meter in length) to the reciever. when the elevator is moved to the end of its travel the servos start to twitch. i have checked both servos individually to make sure they work alright, i have also checked the servos when connected to the y lead. again they work fine. when the full system is put together ie. servos ylead extension lead, this is when the servos start to twitch. Fair enough, it must be the extension lead that is causing the problem. i test this with just one servo attached and it works fine, same thing when i check the other servo. What could the problem be?
Could the signal be getting distorted over the length of the wires?

Thanks