No. The alleged threads that Rogers used ARE NOT the same as the sample used by Dr. Garza-Valdes. Valdez used the Riggi sample. Rogers got his threads from Gonella who he says claimed to have taken them from the center of the C-14 testing area. There is NO record of these threads ever existing prior to Rogers' article and NO chain of custody. Photpmicrographs show whole pieces without missing threads.
Have you figured out why Rogers' statement that he could give an age range for the shroud based on his bogus vanillin test can't be true?
I know why YOU think it can't be true. However, not all of the Shroud was exposed to such high temperatures for a long enough period. There are qualitative changes that occur to Linen when it is heated that hot.
I am also aware that Rogers cannot prove a negative... that there is no vanillin on the Shroud... because you would have to look at every possible location and exclude vanillin being located there. However, there is a database of fiber samples taken from every square inch of the shroud and a statistically significant portion have been assayed and show no vanillin.
Rogers got his threads from Gonella who he says claimed to have taken them from the center of the C-14 testing area.
This is NOT a criminal case, Soliton. No further photomicrographs are needed. There are thousands of threads on the Shroud that have NOT been photomicrographed. I bet you have never seen a photomicrograph of your Riggi Sample. I saw one once but cannot find it now. The photo you provided of the Arizona sample is sufficient to show that there are visible changes in the weave from one area to the next. Your demand that there must be a "chain of custody" for the scientific research to be valid is absurd.
Rogers requested threads from Gonella, the scientific advisor to the Custodian of the Shroud. Gonella sent him threads. Both men agree this was done. Rogers reports he did his research using those threads as well as threads from the Raes sample. Why do YOU have a problem with it as though your life were hanging on the technicality that a photomicrograph was not taken at the time of collection? There is no "Smoking gun" here for you to worry to death. It is a non-issue except to YOU.