OK I'll try it on the way home tonight - if you don't hear from me again it's been nice talking to everyone here at PPRUNE and whatever you do don't turn up the cyclic friction.
Just kidding, I may tweak the knob a tad and see how I get on this evening (and I may adjust the friction also...).
An oscillation dampening tightness is all that is being proposed rather than a frozen stick rigidity.
SB