Finally made this very important lathe modification.
This lathe (G0602 type) already has a built-in gearbox for all metric pitches from 0.25 to 3.5 millimeters. Also all imperial pitches in the range 8 to 72 TPI, but I don't need them. But to do that and also to change to power feed pitches it is required to use change gears. Not too complicated, but it is time consuming.
27-tooth and 60-tooth change gears is the option which gives the finest pitches. Nine of them. Combined with 5 different pitches from new gearbox it makes 45 pitches. As it can be seen from threads @ feeds chart there are all metric pitches in the range 0.25 to 3.5 mm available without use of any tool. Pitches can be changed in a few seconds
steel plate 10mm, 12 mm
steel round pipe 3" dia
various gears 45# steel
stainless steel shafts dia 14mm
6201 ball bearings
4 washers (made from 1 HRK coins) spacers between gears