HI Rody for the last 10 years i have only ever used os speed motors in all my cars, whether it be 1/8 onroad or 1/8 offroad or 1/10 nitro, and after reading all the positive comments about your engines i have decided to pull the trigger on your vs r2102 engines, my question is were can i expect to see biggest difference over my os 2102, for example should it expect to see a better bottom, mid, or top and should i expect to see better mileage. Cheers