. . . next, Rodinal 1:25 + Salt (same method as above).
After scanning this one, the difference was quite a shock. I particularly like the results of this one. The salt, whilst not making much noticeable difference to the grain, has boosted the contrast throughout the image to another level.
After viewing this, I realise the standard 1:25 seems quite 'bright' and not as clearly detailed . . .