George, I've never measured a cap iron set. I'd say it's just slightly further back than a tight smoother shaving, and those shavings are about 5 thousandths thick - not real thick, but not flimsy smoother shavings, either.
You should make some planes and send them to me You know I'm too cheap to pay you for them, though. You could make a slightly scaled down buddy plane for your gigantic 3" wide jointer.
I think if you cozied up to a couple of folks down at the museum, you could probably get some of their stock. I'm *very very* fortunate that Prashun shared what he has with me. If the topic didn't come up on this forum, I'd have never known horizon had beech (you could call them, too).