Jim Matthews
Packaging a given steel type with a range of sharpening media (minimum/convenient/extravagant) and a copy of "The complete guide to sharpening"
might be popular.

I said at the onset of this ambitious slog that curating an affordable "pairing" of effective stones with irons is an obvious outcome of the research.

The genius of sintered metallurgy is it's predictable qualities.

Figuring out what makes a workable vintage iron desirable is cloaked in forgotten lore.