I'm being slowly sucked in...
I purchased (and have since read) the Wollard book on the Simplex. Someone was blowing them out on eBay for a while at $10 and free shipping. I certainly learned a lot of Simplex specific things and think it's a nice piece to have in my bookcase.
I own no actual Simplex yet, but I've got an oil can! Maybe someday...gotta get through a backlog of project machines I've already got and finish up the current Doodle Bug project, but maybe someday...