[jerryhawthorne]

Art, with that little movement, sounds like you need something stiffer than just dial cord. Without a tensioning spring on the dial cord, not much of a chance of it working. Probably more drag than just turning a tuning cap and with the slight movement, you need some real tension, no lag or stretching of the cord. Try a stiff spring on the line. Interesting problem, not knowing what was there originally.
Jerry