Grats on the bikes. On the seatpost, you can try using an aluminum soda can as a shim to fill the gap without having to get a new seat post. (Others may have ideas on thin shimming materials as well.) Also, "carbon assembly paste" can help get stiction between the tube/shim/seatpost to help with slippage. They're available in trial (one shot) sizes from bike shops that sell CF bikes.
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