boomer01 - hey congrates on getting a CEN matrix, i this it is very underated as a racer. i have the pro my self as well as the fre truck. i suggest you upgrade to the alum. diff cases when you are able to, the are $10.00 each. on the diffs, since they are limited slip the seem to work better on lighter fluids. they seem to have about 2000 built in to them. i am running grease-2000-grease, with the orings removed in the front and rear, this works great. as for anything else the setups are all pretty close. go to cenracing.com for setups and forum, you can find good info there.