Swinger for kx65/cobra question

we just got a cobra/kx65 mod it's alittle rougher than expected we are going to need a new swinger, it already has JB front arms so figured we'd stick with them, on their website they list it as stock, +1, +2. Was wondering which one most people have had the best set-up with. My boy is 9 and weighs 60lbs so not a real big kid. Also it seems the stocker makes our tires awfully close to the rath nerfs so I'm thinking plus one just to fix that problem anyways. Thanks for the help

+2 is what we ran and what we see on most at the track.

We just got a JB swing arm for a Cobra/RM85. When I called JB he said most people run the +2. There are different shock mounts too depending on your shock. Give them call, they will help you out.