I've seen Mike's Sand Boas (in fact, I sexed them for him and even bought a pair myself, lol).

Since when is feeding an appropriately sized prey item once a week "overfeeding" for KSBs? I know he is not powerfeeding his animals....I've been to his house & seen his collection. He keeps & breeds mostly Green Tree Pythons, so he is used to having animals with slow metabolisms and not pushing their food intake.

I think that the age of his breeder animals and genetics are playing the biggest part....not any sort of husbandry faults on Mike's part.