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Brian, cmbicycles has calipers, yet you still recommend reaming, as in your first post in this thread, and now ask for images but have never asked for measurement of tube ovalization or deformation..
Let's go back in time: There was a distinct decision made at Merlin, (years before Serotta jumped into the Ti game), to make a machined seat-top that would hold up to welding deformation and provide the customer with reliable and smooth seat post adjustability. These inserts were machined in-house and were the most expensive manufacturing process in Somerville.
The process: Start out with schedule 40 stock; machine the relief on the top of the ST insert; machine the taper, (later butt welded); Cut off piece. Pieces were then press fit into the run of seat tubes, then had binders and BB's welded in fixtures, then slots and relief holes cut. After the frames were welded, there was still light reaming to be done in finishing..
IMO, the ST collar/reaming-tubing after welding route is a shortcut adopted from the mtb world, and I was surprised when Serotta went this way for Ti.
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