I just re-installed the strut spacers and seem to have it dialed in with the shortened rods and a proper mix of ride height and suspension extension. I tried the spacers last year but with factory sensor rods because i didn't realize it was needed to balance the system out. it makes sense though i guess because there's apparently a "range" the vehicle wants the height sensor to move within. Adding the 50mm spacer is equally offset by a shorter rod length of 10mm which is roughly what tells computer it's 50mm lower. you end up with the strut at it's neutral length and air pressure but the vehicle at an actual 50mm taller.
Now, i feel like the geometry of the control arms will mean that's not as stable at highway speeds even though the air spring and the damper are both at ideal neutral length.
So i went out to test what is the most compression that rides ok on the highway. well, it's not much. i was hoping i could at least drop 25mm which would be splitting the difference and set the vehicle at 25mm above factory neutral and the strut at 25mm compressed. 25mm sucks. rides like track car but worse because a track car strut is not simply a normal one compressed already. The travel until too stiff is too short. This may also be due to the nature of an air spring vs a high end progressive strut like a Billstein pss10. ( I bet the bp51 people put on Land Cruisers is awesome)
The air sprung land rovers shine on road trips sitting at the factory engineered heights. This thought actually makes me wonder how the Range Rover struts that are used in vehicles with the 'automatic higher speed sensing lowering' feature. I had an 07 RRSC, it did this at higher speed like over 76 or something, maybe 80+. How is that strut different that it didn't feel like crap when a bit lower?
I'll probably end up at -20mm at most to get suspension arms closer to neutral while keeping ride at decent feel.
Today I'll be testing lowest possible height and drive-ability for parking garages, camping, and of course in the unlikely event of total air loss. The tires I'm testing on are nearly 34" BFG KM2 12" wide 285/70-18 on factory LR wheels. I tried my 25mm spacers which looks truly awesome but is an equally no-go on clearances all over the place for the front tires. My sliders get caught up as well as the bumper area. Those could both be modified but not right now.
In my experience you need to get one thing at a time dialed in just right before adding a new issue like spacer/stance width.