Oval carbon can sleeve.

[utopia]

Thanks for all your replies, chaps.
I'll have a phone round and see what the score is.

Ezio .. your feedback is very helpful .. just the sort of experience that I was looking for.
My existing can is about the same length as yours and although I intend to lengthen it a little, it will still be a few cm shorter than normal.
Maybe that will assist my cause.
Your can certainly looks fine in the pic.

I did find myself toying with a titanium sleeve which came up on ebay the other day.
But that was round too and the vendor suggested that it would easily adapt to oval endcaps.
So maybe I'm worrying unnecessarily.