I got the dampers from Milners off road racing department, in this country. I had been looking at getting them form Australia, but had a conversation with Milners and decided it would be better to have some back up from the local fox agents
The compression dampers are kind of set and forget items, they do help with mating dampers to spring rates, and yes you can stiffen the car up for road use and back them off for off road use, if I remember the damping is set to something like 80-60 in fox measurements, the adjusters are on the 60 side and can give an equivelent of 80-100 when fully adjusted. I am currently a bit over sprung at the back end and have been toying with getting some slinky rear springs from JulianV, also after a bit of experimentation on the fork lift I do have a couple of issues to iron out, I need longer break lines and the rear springs get very close to dislocating, JulianV also talked about doing a mod to the ARB links to let the axles flex more.
The quality of control in both compression and rebound is much better than OME, I tend to drive the truck like a bit of an arse and I had some pretty dire damper fade from overheating dampers, BUT you do ending up paying pretty handsomely for the performance increase. The other major benefit for the 100 series is that I have got more travel out of the IFS system, it allows a longer down stroke for the same lift height.
I didn't manage to get any pics on the fork lift, but will have another go when I have the break lines sorted out