Jeepers Tom What a contribution. I've never seen anything like it. I'm running out of superlatives here, but I would say you have given me and many others I'm sure a very very welcome case of 'information-overload' already these past few days. It is going to take me ages to work through scrutinizing this lot. Another thing, I don't know what type of scanner you use, but the clarity of some of these cutaways is simply astonishing! As always, magnificent selection. Thanks!
Werks, Thanks for your comments. To answer the question, I have a Canon Canoscan that is probably about 5 years old, so not the latest of equipment. Part of the advantage is doing the magazine scans very large, so the minimum size that I have on the original files will be probably 300 dpi, at 11x17. I bring them down to 2000 pixels wide to post; still large enough to look OK, but not so massive a file to deal with. The originals, which would be something like 5000-6000 pixels wide, are better to clean up and pull all the holes out from the magazine wear over the years.
Another feature on those Yoshikawa prints is that I have the original prints, which appear to be litho on high gloss, so they can come up to the larger size fairly well.
Still have a bunch of half-drawings in a file to be assembled when I get the chance, but am on the downhill side. May have to pick up on those old Xerox copies, but not sure how those will hold up. Guess if they come back down again, they will be OK, but not promising the absolute best there ... at least they will be new material for everyone. Even have all of those Haynes covers copied to work with ... wish I had held onto them, but not sure where that would have been possible. I have close to 500 of those copied, almost all of them Terry Davey illustrations.