Originally Posted by neohistory
Alright, well I'm glad I'm not a commercial Brewer then. When would you suggest another reading?
Well, again, that's up to you. There's no quoted time line i.e. how long to drop from X gravity to the 1.020 you mentioned etc.
Me? Well I just wait till it stops bubbling, then start taking readings about every second day (to get the 3 identical readings across about 6 days), which is when I'll rack it off the gross lees, ready to start clearing (or so I know when to stabilise/sulphite, before adding honey for back sweetening - which I do before it clears, as there's no point in clearing, back sweetening, getting a protein haze and having to clear it again).
If you know the start and finish gravities, and the alcohol tolerance of your yeast, then you're in a position to know the approximate max % ABV, as well as a pretty close calculation of the actual % ABV produced by your efforts, and the likelihood as to whether it might need back sweetening or not.
I like my meads about the 1.010 area, anything more is too sweet for my taste.