Advice needed - slipping tuning drive cord

[Murphyv310]

I've never had great success with wax. What I have found is the spindle on the tuning knob shaft gets very shiny so the cord slips, a rub with emery paper and the cord cleaned with IPA always works for me. As Terry says the tuning cap itself could be stiff and in need of adjustment and lubrication.

I'd advise you clean off the grease off the cursor track, just make sure it's clean and use a coupl of drops of engine oil instead. Grease drags and can add to the resistance and make the cord slip.