I have always started out around 5/8ths above for the knocking point on my trad bows and adjusted from there.
Shooting off the shelf requires a little more clearance than you would think and if you are shooting from an elevated east you could drop that by about an 8th of an inch.
You may find with a little higher clearance that the arrow will fly noticeably better.
Also when shooting trad equipment try not to fall back into the training wheel mental mode............hehe
It is like comparing apples and oranges.........
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