Relating my own experience with this type of subject matter - more and more, I don't believe I'm an expert on anything. As soon as I think I'm as well versed as possible on a particular subject, someone always seems to either prove me wrong and/or add to my knowledge base. This is equally true with antique tractors. I'm pretty well rounded in 80s and 90s wheelhorse tractor stuff. However, every now and then - I run across some model number or rare implement I've never seen or heard about. Maybe prototypes or limited production stuff or something. It was only recently I saw some publication that had a whole bunch of attchments I'd never seen. On one page, it pictured like 18 or 20 different implements, including a cab variant I'd never seen. Let alone what Ford did over the many years long production run of the N series and its later generations such as the Jubilee. I don't think I'll ever know even half of the stuff they tried back then.