Update on this, the Revive service is pretty straightforward, couple of tricky little circlips the only issue. Lovely and smooth now.
However, take care when releasing the air from the post (and putting it in). Make sure the valve is pulled out fully (pushing it down is how the Revive feature operates) before you activate the shraeder valve. Don’t overtighten the little adapter/extender or try to reinflate it just after ‘reviving’.
If not, it will spit a load of oil out which means the post will not stay fully extended under weight, so you’ll have to remove the valve core and add more oil to replace it, which is a total PITA, as my valve core remover didn’t fit in the recess with the valve…ended up having to saw bits off it to get it to engage.
