Finally, how was C14 dating modified based on tree-ring chronologies? Any at all?
Tree ring dating is normally done using standing dead bristlecone pines from the White Mountains of southeastern California.
By dating the rings in 10-year increments you establish a calibration curve.
Doesn't matter where it occurs.
Points were, the 'extension' process and human interpretation.
Since you did not address those points, I assume that you recognize they are fatal to the claim.
Oh yeah, and the point about whether C14 was modified as the result of this 'sychronization' w/ tree-rings.
Where is that process so that we can see where the variability lies? Could be all over the board, like the 'geologic column'.