[jhautz]

I agree w/ CrazyJR... LT springs, but I'm using them on the P2 rockers.

Blue in back, silver in front.

Not much preload required to let the driveshafts run parallel to the ground.

Mines not quite 12 lbs though, more like 11 lbs. You can probably get away with stiffer springs if you want to at 12 lbs. but the LT springs are free if you got your kit new. It comes with them and it should be a good starting point.