So I pick up a used 4.2 about a month ago. As Im still deployed, I have been trolling the forums for hop-ups and set-ups and the like. I would like some input on a couple parts and also possibly a starting point for set up.
Track is medium to high traction and lap times are about 15-17 seconds. I will be running a Tekin RS Pro and 10.5 motor. Tires start at a bar style and wind up running slicks by the mains.

I am looking at the Avid Centering Motor mount spacer and the ESC center deck.

Being as the buggy is narrow already, putting some ballast weight on the RX side has always been the thing to do. I like the idea of centering everything as much as possible so that is why I am looking at these in particular.

For set up, my b4 was very low on rear traction so here is what I did.
Inner hole on ball studs with 3 washers, outer or middle hole on hubs, 2*toe with 1* AS in the rear.

Just wondering where I should start with the new kit as far as set up and advantages of the above parts?