Actually the brakes on most DP are NEVER replaced .you'll never put enouch miles on it to replace them due to wear. That would be my concern as the Brakes will be fairly expensive if they do need replacing. The ride valves are adjustable by a shop that Knows what they are doing There are a couple good ones here in Oregon (where the coach was built)
I agree Call country coach in Junction city Oregon and they can help with Info I'm sure. They arent the "old "country coach and in fact are soon to be a division of winnebago But they have a reputation for supporting their brand.