Bought a light, showed up brilliantly packed. Was missing a part - I just assumed it was a different option than my other example.
Turns out it was not, and @rcwiily took the time to ship it to me at a cost greater than the part itself (I didn’t even know it was coming, I’d not read PM/E-mail in the preceding days).
Very gentlemanly, and appreciated. An exemplar of a great seller.
R