Interesting find there Jack.
He obviously had high hopes for the machine as more than just a lawn mower! Interestingly the number of attachments available was seriously reduced by the time the yellow HD8's came along. You'll recall the detachable cutter deck patent in your patent article which aligns with this multi function tractor idea.
There is a photo of a HD8 with supa-swift badging lurking in these pages somewhere. I'll try to dig it up. Perhaps a similar sort of brand/ marketing association?
Cheers,
