Wow, great harvest Antichode. I have only 1 big log, mid section, 12"x4" and 2 smaller ones from my first ever harvest, after 6 years. The tip is starting to root and the stump has started pupping. Also got some base pups on another cactus. The mutant Peruvianus is growing slowly but healthily.
The pale blothches I mentioned in another thread dont seem to have gotten worse, nor spread to the bigger plants. Gonna try some Cal-Mag fertilizer, as suggested, apparently this can be made from eggshells dissolved in vinegar (calcium acetate), combined with Epsom salts for the magnesium.