Originally Posted by
BCRider
Ever frame I've ever had or played with the seat post is a light push fit or a slip fit but with no detectable rocking play. What you have at present would see me cutting up a pop/beer can to make a sleeve shim to fit between the post and the insert to remove any detectable rocking of the post.
First I see a mistake on my part. The nominal post hole should be 31.6mm NOT 31.8mm.
I thought about the beer/pop can angle but today's coke cans are only .003" thick!