I liked my YZ-2 best with the wide rear end, 3-gear and gullwing front arms/shock tower. As for the diff, you may want to try the gear diff with 2 spider gears and some thicker oil (7,000 as a starting point). While I did not try a 2-spider gear diff in my YZ-2, I loved it in my 22 3.0, and it has been great in my son's Firebolt!
The DTM has some interesting options, such as the rear hubs and rear shock tower brace. I wonder whether the CA or the DTM is the better starting point for my next buggy kit?
