I love the idea of retaining the factory air bags as well. I'd love some more information on the air bag spacer and adjustment to the height sensors. Thanks in advance!
If your GX470 has needed significant wrench time, I think you are in the minority, what have you had to do? My GX at 235K (owned since 40k miles) has been nothing but maintenance outside of an airbag and even that was torn by my shop. I've not owned an LR3/4 and heard they are greatly improved...