I purchased a '85 Bottecchia frameset as a retro reclamation project. Last night as I was putting the finishing touches on the build (Campy and Modolo), I tried unsuccessfully to insert a Thomson 27.2 seatpost into the seat tube. I measured the ID with a pair of calipers and came up with 27.2. I then re-lubed the post and tube, but the post would not insert more than a couple of inches. I also tried a American Classic 27.2 without any luck. Any chance that a Bottecchia owner could provide some insight? Does anyone know if this vintage Bottecchia seat tube is actually 27.0?