I have run my Talion on 5s and 6s with a 15T pinion. It seems a bit faster on the 6s, but not a whole lot faster. On 6s it does wheelies, but not on 5s. Not that wheelies are a GOOD thing LOL. My question is this....... what is your opinion on 5s vs 6s? You could always go up a bit in pinion size on the 5s right? What is the benefit of the 6s if you could swap pinions for more speed? I'm guessing that "absolute brute force" is increased with the 6s over 5s, but I'm not sure if it's worth it. Just looking for some opinions if you don't mind. Thanks!!