Partial update: I tried a different seatpost and it slipped too. My next two steps are to buy some calipers to confirm that the seat tube is, as appears, larger than stated and track down some Tacx carbon assembly paste. Fingers crossed. Frustrating.
And thank you everyone for all of your suggestions. The help is very appreciated.
Last edited by Climb01742; 08-17-2014 at 05:17 PM.
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