I'm really leaning towards 4:1's with faster motors. My tiger is heavy with metal chassis tracks , road wheels and sprockets and its a beast . but if I put the same gearing in the Leo I'm thinking it's gonna be slower because the drive sprocket is smaller ? That's where the hot motors come into play. I'm not willing to upgrade electronics at this time, and it seems to me the #1 thing on everyone's list for electronics is sound, i personal dont care about sound at all Im into performance . it has to be able to climb and go through the yard