For what it’s worth, my Mrs’ has had 2 KS seatposts. The first one was used 8 times and lasted 6 weeks, before it had to go to the shop & then back to the distributer.
After 3 weeks of chasing they replaced the 900 with a 950 as they didn’t have any stock of the bits needed to fix it. That lasted approximatly another 5 weeks and was only used a handful of times before it also sh*t its guts out.
Again, went back to the shop, and back to the distributer. Another 3 weeks of chasing (getting close to leaving date for the Mega) they decide they can’t fix it again as no stock of bits, so the shop replaces it with a Reverb.
I wish it worked better, as the lever design is head & shoulders over that of the Reverb, just the actual post itself is complete junk.
The shop in question have sacked off selling the posts now, as the large majority of them have come back in one shape of form for warranty work. Makes the Reverb look like the pinnacle of reliability!!!