Does anyone know the thickness difference between the Medium and Thin weights of these heads? Is it like Ambassadors (10 mil) and Diplomats (7.5 mil)?
Aquarian's website doesn't say. I just threw away an Aquarian Products catalog a few weeks ago, but I think I've got another 2 or 3 somewhere. I'll see if I can find one - maybe the thicknesses are listed in there - and let you know.
Knowing that the Super-2 head is one 5-mil ply and one 7-mil ply (I was told this by Roy Burns), I would think that the thin would be a 7 mil. I don't think they would do a 7 and a 7.5, but I certainly can't be sure of that. But, I think you're basically right on that. I'll see if I can't find out for sure, though.