how about doing a test strip,
to test for dry-down
and do another and test for dry down+tone down ?
that way you can dial down your enlarger by x-seconds ( or 1/10 seconds )
so you won't be frustrated by those things at least ..
its kind of like the joke about the little old lady who insists her gas smells like flowers
( her friends disagree, and tell her to seek help )
she goes to the dr's office and demonstrates for him, he opens the window
and says -- first things first, we have to fix your nose ..
so fix your dry down times first, then work on the other stuff
( and don't forget to have fun ! )