Leo Lichtman wrote:

Grant Erwin wrote: (clip)Anyone "been there, done that" or have any good
ideas or input?
^^^^^^^^^^^^^^^
For minimum weight and maximum strength, he should check out titanium
seatposts. Very costly, but I believe there is no better. Does his bicycle
fit him? For a road bike, the top tube should be an inch or so below his

Carbon fiber.
Might be worth going to a good bike shop, and asking for a new one to fit.