Thank you for your reply,
i have been told by someone else that some hutch overseas seat posts were made to 22.6 but don't know how true that is, i'm from the uk and that might explain that back in the 80's when i fitted one to a 1980 mongoose it fitted without a problem but like you mentioned it may have not been the correct size and i just crushed it up to meet it.
so you think they were all one size from hutch ?
I have an 80's Hsin lung layback seat post that measures 22.6 and it has a very slightly thicker wall thickness, it's full cro-moly 4130 and i have heated it and bent it today successfully to the same angle as the hutch.it didn't need much bending to match the hutch angle
it needed a re- chrome anyway.
the other option is maybe to very lightly sand blast the hutch and get it stove enameled in black that may give me the extra 0.4mm i need, i also have an original hutch coin decal (chrome on clear) suitable for a black post.
regards
john.

John,
i don't know about overseas Hutch seatposts.
could be that those were 22,6mm
back in the day, i never measured my seatpost because thought they were all 22,2mm :-)
I've seen many frames that were crushed up on the seatpost clamp area to clamp the seatpost.
You have 2 good options like you described in your reply.
But if the Hutch post has good chrome, don't powdercoat (i think you mean that) it!
Always try to save the orginal finish first!

the hutch post was mint but it was white and i've had it chromed and added an original coin decal and made the mistake of not trying it first before i spent money on it, also i bought from the US a near full set of hutch pro racer decals just for 2 coin decals, it's getting expensive seeing as i've now waisted one on the seat post
the hutch post owes me a fortune now anyway, needed it chrome to go with my bars.
i will be getting the Hsin Lung seat post chromed now and will probably sell the hutch to get some money back.