After our stop for dinner the brakes were fine the rest of the way. I do think the front/rear balance is off and will have Spartan check things out. If you've driven on I95 DC/Philly/NYC corridor you know slowing down and/or using your exhaust brake a great theories but no grounded in the reality of the situation. Even in the far right lane, if you leave the smallest gap in front of you it's quickly filled by a four-wheeler who immediately decides to slam on the brakes. Sunday afternoon traffic back into the city isn't the usual 20 mph trudge, but a 0 to 75 to 0 slinky that repeats for way too many miles. No fun in a 40 DP for sure!
Thanks for the quick feedback.