The Anti-Stall has made the difference and a couple of hundred miles of stall free motoring, including a return visit to MoTest for a new 12.5 month MOT, has ensued.
I'm thinking that the 'free travel' in the throttle lever is part responsible for the confusion here, coz on part throttle, to a point, there's no effect on the actual revs (the cable is tight and the throttle lever moves 'from the word go', just does nothing), which worries me a little, so I'll be packing the spare pump for Paris later this year.
NB: any thoughts on at which point you're just wasting thread lock by applying too much?
See pic: about right? too much?