Sounds like you are on a rite track. Have you run Henry county yet? Looks like a sweet track and i cant wait
Ive used shock oil in a b4 rtr gear diff with good results, i think i ended up using some 35 wt losi i had lying around. Added some rear traction without over-doing it.
Im running similar camber to you, 1* up front 1 1/4 in the rear. But ive been running this setup indoor, not sure how much it is going to change for outside yet. Probly going to end up tweaking it just a tad.
The slipper is a good point, esp if you have that reedy 3300, it likes to rev
