i dont run an xray, but lots of people do and most run a final drive of a 7.55 with either a diff or a spool, the diff would be slightly tighter than the rear diff
traction is excellent and stickum seems to get the most out of the available traction
you do not need a roar membership to race here but im sure they can arrange help some how
yes bring table, chair and extension cord and ur all set