Seemingly to me, by the deafening silence, something to buy if you haven't checked your setup,
so you can get better results with a misaligned saw.
But that's very optimistic speculation on my part..well gotta keep thinking as such.
I've documented this in a few places as well as here, but possibly the most clearly with my most recent editing on THW2, difficult to squeeze it all into something concise.
Haven't got any decent argument yet as far as I'm concerned,
Getting closer to finding out if I've been successful with my experiments.
If you wish to see dial adjustment jigs, then the Laguna driftmaster might be worth looking at,
and of course, Steve Maskery's micro adjust fence jig aswell.
All the best
Tom