That would also explain why people have said the ride improves with new air springs. New ones will have nice supple rubber compared with older ones where the rubber has started to harden with age so will flex less. Same with the Arnotts which, from the one time I have ever seen them, they appear to be thinner so will flex more, giving a softer ride when extended.

thats the most interesting thing ive read on air suspension for a while , better than its going down again.