I also read a piece of advice (no idea where) that for those of us off high handicaps, for normal shots just have one stance/ball position and get that right before starting to mess with moving its position in the swing
And while the OP (& I) are still off 20 then I'd suggest we don't have that one single consistent stance/ball position nailed yet
You don't have to be 20 handicapper to have an inconsistent ball position. I still have it wandering all over the place, although I'd say my fault is having towards the centre too often. I used to have a book, ghost written probably, by Tom Watson. He favoured the 3" inside the left foot and just widen or narrow the stance based on what club you were using. I play my best golf when I do something like that.