I was asked today what I was going to do with the 12 old bottle teats I'd been saving from my son's milk bottles... I'm not sure any answer would have been satisfactory but the truth is I want to make a weird Halloween costume.
They stayed... for now
I started on 20, went to 40 and I've been here ever since. I get a bit of a lull at about 6pm, but it's not so bad.
During the shortages a while ago I managed to get prescribed some 50 and it was just a bit too much. I like a coffee or 2 in the morning and 40 works well with that for me. Any higher and it would buzz a bit.
I have the occasional break, usually when I forget to get my repeat. generally 3 days of aching and complete lack of concentration, then when I take it again I'll have a very very productive and late night.
Find what you're comfortable with, It sounds like you already have!