Colchester Bantam Mk2 metric 6mm

Use RDG Tools Gears and std gears (N,P,Q): ( 72, 60, 55, 50, 35, 32, 25, 20, )

Use all gears between 20 and 80 and duplicate 42's

eps. accuracy limit

Result :

using 54 combinations of gear ratios =>

metric 1.5 mm pitch :
1, > Q T 5 Feed approx: 0.18
2, > P S 5 Feed approx: 0.18