Thanks.
All the published sources I've seen invariably say 12 torpedoes total, except for the four with the stern tube. The author of that article could be mistaken, or all the published sources could cite one original source, and that was wrong. I've never heard anyone say the four boats with the stern tube carried 16 torpedoes, which would be the case if they could carry fourteen forward.
It would make since to have two full complements of reloads, totalling twelve, but it would also make sense to cram in as many as possible. As far as I can see the bottom line at this point is "I don't know".
No matter what the true answer is, those are some cracking good pictures. Thanks again.