I had a 27.2. The internal cable snapped, I tried replacing it following the online video but managed to undo the pressure stick by mistake.
I think the larger diameter ones are much better and easier to work on yourself.
It is with Jungle at the moment having the pressure stick replaced + a service. However, the whole batch of pressure stick that they got from KS arrived with no pressure in them. I think I have to wait a while before it get fixed.
It also broke when Superstar first stopped supporting the posts so I had to wait quite a while just to get someone to look at it.
Not a good experience overall but the service I got from Jungle so far seems to be fine and the repair cost is very reasonable in my opinion.