I recently got hold of a carvec unit so I can make a subsea gimbal for filming with the BBC. This means it has to be a servo system as its very offset in weight and cant be balanced. Anyway I am hoping you can help as what seems to be happening is that on pitch and roll it never seems to come back to centre. It always seems to be off to one side. For example if I roll is 20 degrees over to one side and then return it its 5 or so degrees off from 0. I have played so much with the pc software but to no avail. I thought it could be my servos to which are digital brushless hitec servos. Anyway any light on this would be great as I am running out of time.