So, did you keep the weight off from your other fasts? I ask this because your nervous of refeeding? I will admit refeeding has caught me in past with fasts, such that a day or two afterward you gain all the weight back that you just went without for days to lose. And that’s doing keto. However, I think you will do better refeeding as keto then you would just eating willy nilly.
And with your extra long fasts, perhaps you are adjusting your body to be a smaller weight then it previously was used too. Anyway, maybe you always been doing keto with these, but thought it sounded like you might not be.