My 2003 Adventurer also has a 228" wheel base and the total length is 38'. I don't have any handling problems. I haven't added any modifications. I have 19.5" wheels and carry 90# in the front and 85# in tear tires. I am going to put AirLift air bags on front and rear to correct a lean to the right. On one trip to Arizona I left North Dakota at 20 degrees below zero with tires aired up to the normal pressures. As I was descending into St. George, UT, the motor home started handling poorly. I spent the night in Mequite, NV and when I checked the pressure in the morning, the tires were 15# over normal pressure. I reduced to the normal pressures and handling returned.