spektrum trigger problems
 

On my DR3 the trigger is giving me fits.I'm running a Mamba pro and my trigger response does'nt start till over half way!! I have had guys looking at it and none of us can make it more responsive.at the start it'sd ok but if I let off it lags going to full throttle.Tried everthing we can think of to remove lag but nothing is working,I think I'm going to 3PK.
Any help out there??