There is a bike shop tool for cutting seatposts down, that you slide
over the seatpost, and has a slot cut out of the middle of it, which you
then clamp up at the desired point. You can then clamp the tool firmly
in a vice, and proceed to go at it with a hacksaw. The clever bit is
the guide for the hacksaw blade that is cut down the middle of the tool.
This way you always get the cut at 90 degrees to the post.
--
Gumbo
------------------------------------------------------------------------
Gumbo's Profile:
http://www.unicyclist.com/profile/3258
View this thread:
http://www.unicyclist.com/thread/27274