Drew:

As a footnote, you might consider using anti seize
compound (from the auto parts store) between the
post and tube. I pretty much use it anywhere I don't
want stuff to freeze up -- pedal to crank threads,
freewheel to hub threads, seat post, stem - you get
the idea.

Stuff contains lead thus toxic, so glove up at least a
finger prior to application. You don't need much.

Mike Larmer