[suicideneil]

Yeah, thats fine- so long as you can adjust the motor side to side to allow for smaller and larger gears then there wont be an issue using 10t or 12t- does just affect the speed and current draw of the motor a little. I think anything between mod .5 & .6 would be very rare or custom/ bespoke for a certain use- an imperial gear might have the equivalent pitch when converted to metric units of measurements.