By the way, I added a spear gear data table to the calc (under data tables). It probably doesn't have all the vehicles in this thread right now, but it's better than nothing...
I have a DuraTrax Vendetta S.C, it uses mod .6 gearing I want to use my Novak Mongoose Brushless system in it. Motor has a 1/8" 3mm shaft, stock motor uses 2.3mm shaft so I need a new pinion gear. Can I use a Metric 48 pitch gear? (Mod .5292)