penfold
Ambassador plenipotentiary
- Messages
- 2,116
- Location
- Argyll and Bute, God's own country.
Easier to just buy a pair of gears and mod them to fit the shafts; you only need a 48 and a 32 as the 60 and 20 are already there. 1/2" per min is pretty slow; you'd be taking a hefty cut to need that.