Mike, I can almost see the photo posted by Pine Cone Don, IIRC, that clearly showed a piece of C channel welded between the C channel frame and the axle bracket a few years ago.
My first replacement High Lift Axle.
YES, before Casita made the High Lift Axle available, people were adding spacers to gain more height.
I replaced my first axle with a high lift axle after I bought my 17 2001 Freedom. Then when I bought my new 17 2004 Liberty, it came with the high lift axle.
The axle makes a big difference. I also replaced the 14 wheels with 15 wheels and tires