I just got mine.
I have used adjustable seatposts since 1995.
It does have movement side to side and slight up and down at the nose of the saddle.
None of this is a bother when using it.
I did receive the short lever after ordering the long one.
I tried it today and the spring is way to weak to raise the seat all the way or quick enough in lower positions.
This makes it useless...
My gravity Dropper has a much better spring and action is immediate.
This post with a stronger spring would be great.
It is very well made.
After a few emails a new spring is coming.
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Thread: Rase Adjustable Seatpost