Andy Kev.":axogzptb said:
....
The Norris adjuster certainly works albeit it with your rider that sometimes the blade needs a light hammer tap for final adustment. ....
I'd call that "not working properly". The S/B adjuster is finer and more positive in both directions - in/out and lateral. You won't need a hammer!
Yes the S/B adjusters often have slack but this is OK as long as you get a positive feel as the slack is taken up. Norris are also prone to slackness but don't have that positive feedback - you sometimes can't be sure that you are moving the blade.