I mentioned the play to the bike shop that i bought it from and also sent a video. This was sent onto E13 and they said to tighten the 10mm allen bolt.
If that didn’t fix the problem, they would need the post back.
I did tighten the bolt, but there was still a small amount of play.
Another issue has also come to light – the post is now refusing to engage in the highest position. I push the lever, release and then go to sit down and the post drops to the next position. I then either have to actuate the lever several times to get it to lock in position or pull the seat up with one hand!
Its strange because when the bike is clean it seems ok, as soon as you get out on a ride and get it muddy it starts to stop working properly!
I also changed the cable (inner and outer) and still have the same problem.
Afer some googling, it seems as though the spring was not “man” enough on some of the early posts and E13 are sending out replacements.
There seems to be two different versions of the post – they revised the lever on the new version and also changed the wiper seal to an SKF one. I imagine they also incorporated the stronger spring.
in any case, mine is going back to the retailer!