Duncan, Yes I had a similar problem in Kansas, was pulling into a station for fuel and dropped into a large pothole at the end of the concrete slab, remodeled the step and had to fix when we got stopped fpr the nite.
The FireStone Air Ride raised the coach about 1-1/2 inches and I have
been thinking about 22.5 wheels.
I am going to change out the Air filter assembly for an UltraPower Cold Air Box and the OEM muffler for a MagnaFlow. I'll have the tailpipe re-routed
at that time also. I am going to have the Angle (90 deg now) at the end
softened and raise all as much as possible.
It's really a shame that GSC doesn't want to hear how to improve their product!!
"Ride it like a Ford"