Your images can't be that amazing that you can't send off 1 clipping image from each roll... There's always one bad image on a roll and don't claim otherwise I saw your images they aren't good enough to be afraid of letting go, and you'll get them back.
You can send it COD (charge on delivery) meaning when the package arrives at my house I pay the postage. I'm not sending you money though.
Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1, 5DmkII / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic | Sent w/ iPhone using Tapatalk
And in any case some images comparing the two could lend some credence to your claims.
I certainly do not consider this a QC issue, it is a slow film issue. Efke 25 behaves similarly. I have seen that if it sits around and isn't developed promptly the images are less dense. I suppose it could be my storage conditions, (cool but not frozen - I don't have those special thermostatic hands) but what I see for myself I tend to believe more.
It might be interesting to note that I have never had any problems with Pan F, or HP5. It is probably not a coincidence of epic proportions that I handle my film very carefully. In other words, it's pretty obvious where the fault likely lies, and the supposed victim here doesn't seem to want to really get to the bottom of it, so I don't see much of a need to bicker about it. Some people you cant help. Surfers credo; acknowledge, and move on.