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  • Usual method, if you don't have a reciprocating saw, is a normal long hacksaw blade. You can do some bodges to make it more comfortable (a cork on the spine of the blade where you want to apply pressure with your finger, some sort of stick through the hole that you can grip in your hand), and you need a large number of them because any hint of bluntness saps your morale too much to finish it...

    When I think of doing it again, Seatpostman looks brilliant actually.

    When I did mine I read a very good explanation about getting a carbon post out of a carbon frame by clamping the frame so that the seat tube would be slightly compressed lengthways and so, if anything expanded. Then the post was pulled under tension, tending to thin it. I guess he is doing something like this since he's working with all materials and so successful.

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