wrote in message
...
snip
But I'd also like to know what
others do when faced with the odd lead, QC gearbox problem.
Cheers,
Eric

I have a random assortment of change gears (some home made) for my Logan.

I can swap these out in the gear train that feeds the QC gearbox and change
the gearbox's ratios.

I usually just swap the gear on the gearbox (usually 48) with the new gear.
If I put a 54 tooth gear there and set the levers for 24tpi (1/2 of 48) it
cuts a thread of 27tpi (1/2 of 54).

Paul K. Dickman