Well done, Ken. Thicker lines make it work right. I don't want thick lines, of course. But at least I have the choice now - thick lines and each line where it should be. Or hairline, and some here and some there. I suppose I will learn to love the thicker lines. Sorry to doubt you, craftsman.
mdemarte, thanks for the suggestion. You may well be right, but here there's just a solitary printer, circa 1898 - or seems that way.
You might try the wider line idea yourself sometime. It works with 2pt and later I'll try 1pt, which is closer to the original plan. Cheers, gentlemen.