Thanks, I own a 03 KS w-22
here is a link to a 2005.
My coach is 37' and have not had problems with it. Had ECM reprogrammed by Brazels for improved mileage and seat of your pants guts. Has the 22.5 tires and one of the smoothest rides. I put Bilstiens shocks on her and a toque bar in rear.
Your chassis should have Bilstiens on it now and large front toque bar up front.
My coach had all top line appliances and have added upgrades you can see in Quick Tips link below.
Will catch up with you in the morning for more answers for you.