Advance adjustment(s)

Sounds like you need to change one spring to a heavier one. I have a BB with the Mr Gasket springs and had to leave one stock spring in.

Yes. All that is in another thread. I have some 'test' springs on the way to try out. There are Mallory springs I have that might be close; purple/orange maybe.

If my 'test' springs don't work out (Mr. Gasket 929), I got a Crane kit part number from Mattax that will do the trick. That 'kit' is $40, so I'll try some of the springs I have (or are 'in the mail'), first.

I think the 'opposite' write-ups I've read on the subject get that way from being unclear about what 'more' is. Adjusting the can in a CCW gives you 'more' alright, but not 'more' timing. It gets you more diaphragm restriction, more pressure against the diaphragm, but LESS timing.