My Buggy has 12\40 diffs front\rear. And I run a 51t in the center. On 14 cells, with the 1950\6 you can use either a 14, 15 or a 16t pinion without worries. I ran the 15t all weekend, and speed is fine. Runtime and temps too. Altough for a marathon 1 hour a-main I would use the 14.
Yeah, would love to see a pic! Check
www.photobucket.com Or you resize it, if you want to use the "attach" button.