I have only been fasting since July. Usually 48-72 hrs per fast with 5-7 days in-between. This last feasting period was more gluttony than feast, uf-da. 6’2", 204 start weight, down to 191 just settled into 198 as I start another fast in preparation for this weekend which will be at a retreat up north where my food choices may get dicey. If I can eat relatively clean then I will return and do my one meal a day with a light lunch & HWC in my coffee. If I think my choices were not up to standards I will fast again to reset my “clock” and then keto on for the remainder of September to also see where I level out.
My wife jokes that I can drop 5 lbs by blinking my eyes. Fluctuations of 5lbs my life before Keto were not uncommon and I have seen no evidence that this will change. So I base my current eating weight on an average of the last 3 weeks as it accounts for fasts, feasts and plain old keto eating.
Good luck in establishing a normalized weight!!!