For what it's worth......
I started sharpening by hand, not doing it correctly, in my teens and only using one composite carborundum stone of limited quality.
Then, over the next decade or two, I probably used all of the guides, starting with the Eclipse, then a Stanley-useless-whatever-it-was, next a Veritas (I had two of those, the original one plus the elaborate one). Most of the time using Japanese water-stones. The slurry was excellent at wearing the wheels prematurely.
I spent as much time chasing an effective flat surface on the stones as I did wrestling with the guides and reconciling my new-found belief in micro-bevels with the inordinate amount of time I was spending away from the bench.
Finally, after experimenting with diamond plates, that's all I now use for sharpening in a succession of grits, then a strop, all done by hand.
(As a total heresy, I use my own secret mix of water, fairy liquid and meths to wet the plates).
So, instead of chasing an elusive bevel-edged-ruler-assisted-back-bevelled-nirvana, the real break-through was a examination of free hand-technique, (which has existed for centuries) and the one useful invention - diamond plates that don't break, chip or wear.
It only took about 30 years of evenings and weekends...... meanwhile, I earned my living at other things.
Now, I'm happily retired, locked-down and banged-up in Wild Wales with some of the finest cutting edges known to man - each one uniquely individual to the others.
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