I'm still waiting for mine to be finished at the shop. So I don't have any real answers for you, but I am interested in finding them. I was trying to find specs for the seatpost but couldn't. Maybe it's heavy.
The biggest bang-for-the-buck change you can make to any bike is a lighter set of wheels. You will feel the difference betweeen a light weight wheelset compared to a heavier set of wheels. Changing out the seatpost, handlebar, and stem to lighter components you may not even notice a difference if you did all of them at one time but kept the heavy wheels even if changing all of those components drops two or three pounds.
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