Brian, your other option would be to use rotary potentiometers and a rack and pinion arrangement. This is how my FlightLink rudder pedals work and my intuition says it will give a smoother and more precise action. It may be harder to source the mechanical bits though. (And old Meccano set comes to mind as a possibility!)
Thanks Mark & Dave for the valuable input .... have finished the board and have tested before I fit in the panel. Tests proved 100%. Have popped in a couple of shots and will follow up with the finished job when completed, showing the genuine Cessna controls fitted.
regards, Brian PS. please no sarcasm as to the amount of copper left on the board (a bit short on chemicals) and couldn't be bothered to remove the rest !! LOL