This forum my last hope?

Originally Posted by BrianG

10T @ 7mm diameter = 43.54p (Mod 0.58). Calculated from http://scriptasylum.com/rc_speed/gear_calc.html

Not much help, but you can get an idea...

Man I love scriptasylum. Brian you have done the RC community something that they will for ever be in debt to you for. Couldn't count the number of times I have used it and it just seems to get better with more features and calculations.