Not so much for Jabba' sake, because he has other more direct questions to answer first, but just as a general comment on this point about the C14 scientists stating that there was no evidence of any patch or repair -
- the C14 sample was only cut after 10 years of meetings in Turin where the church authorities sat around a big table with the C14 science representatives, members of STuRP, and various other people, deciding how, when, why and where any sample of the shroud would be removed for C14 dating.
As Goves' books makes clear with chapter after chapter of his verbatim notes taken by himself and his secretary during all those meetings, there was frequent discussion of how to ensure that any sample which was cut would be taken well away from areas that were known to be patched (the patches are huge), burnt or otherwise less than ideal. All the C14 labs had representatives at those meetings.
When the sample was finally cut, it had already been agreed to take the sample from close to the area where the Raes sample had been cut in 1973. However, the church officials and STuRP members present still insisted on examining that precise small region of the shroud for two hours before finally taking a few seconds to snip off a few centimetres from that the edge of the shroud. That two hour discussion was substantially about making absolutely sure to the satisfaction of everyone present that there was definitely no sign of any patch, repair, fire damage, or other untoward features on that small strip of the shroud.
When the C14 labs each received their piece of that cut sample, they all examined their pieces under lab microscopes. In Goves book, which Jabba has, there is actually a picture (not very well printed) of one of the photos that the Swiss lab took of their sample.
As Gove made clear, it was immediately obvious to all three labs that the shroud sample had a unique and easily identified weave, which could not be confused with any other cloth (inc. any signs of a repair, as viewed under lab microscopes). Indeed, also in Goves book, it's made clear that during the ten years of meetings, Flury Lemberg as well as Gove and the other C14 scientists, made clear that Walter McCrone's suggestion of a need for blind testing of the samples, was both scientifically unnecessary in the case of a technique like C14, and was in any case practically impossible since the weave of the shroud was unique and instantly identifiable.
OK, so just to be clear - the C14 lab representatives were party to all the above discussions and were witnesses to the procedure of cutting the sample well away from any "patch".
When the paper was published in Nature it was of course a joint publication with all three labs named on the paper, and as others have already pointed out, the paper specifically says that the procedure of selecting and then removing the sample, included agreement from everyone involved that it was cut from a region well away from any areas of repairs, patches or other damage etc.
So that is the answer to Jabba's question.