The Hario...

...is dialed in. I pulled the inner burr to get a better consistency, and used two washers under the locknut so my socket could get a better grip. After fiddling around for another 15 minutes or so, here are the results:

2 notches off locked adjustment nut

4 notches

6  notches

8 notches

 10 notches

12 notches

Took  some doing, but I got the burrs pretty much centered (as I can get), with no drag one notch off the locked adjustment nut. I don't see the need to go stepless. I'll pull out my French press this weekend and see what kind of brew I can get with about a 9 setting. I did a 6 through my Braun (gold mesh filter) and very little sediment. Was it worth all the trouble?

Yeah, sure. I think so.