Alright, I ran the buggy on 4s with the 600XL and it seems really good so far. Gearing is 20/44. Top speed is a little low, but accelleration is perfect. Unloads center diff with 50k in it pretty bad, going to try some 80 or 100K in it next. Ran hot on low timing on MM, but high timing cooled it way down. Gotta test it at the track to see what I am really workin with.

Sounds good. I was using the center diff, but soon ditched it for the Ofna solid centers and I really like how it handles. I don't know how good it does if the mechanical brakes are used.