Thanks Michael, that was very informative.
I have the 2K scan of the negative back and we are happy with the results. Its a little early to comment as I am viewing it in Log, but the footage all looks really nice to me, as expected, the 500 ASA is grainier than I remember it, I tried to rate it at 125 ASA (where possible), but this stock clip tested an average +0.50 denser than the AIM density, therefore it had 4 stops of base fog due to its age. We are shooting the second half of the film on the 27th of August and I'll be using some older 500T which is on average +0.60 denser than AIM density, looking forward to seeing the results!