Well, now it turns out that may not happen for a long while... if at all.

TSC Merrimack called me today and it turns out that they never did order that missing PTO drive weeks ago like they said. Some kind of computer mix-up apparently and the order never went in. So the order just went in this week and now it's unclear when it will come in. They couldn't give me a date.

I kinda sensed some uncertainty that it would arrive at all. Been there, done that before with TSC in CT on other products.
They offered to fix me up with a drive (and I assume a slip clutch) out of regular stock, but I wouldn't take it. Don't need no fit or warranty hassles due to a non-KK supplied PTO drive & slip clutch.
They also offered me the black Bondioli-Pavesi drive off the smaller tiller (I guess it never sold or maybe another one came in???), but I refused that as well. Given that folks have reported failures with the Bondioli-Pavesi drives, the last thing I want is one taken off of a smaller machine than the 72". Besides, I was kinda hoping for a leftover yellow Eurocardan as a replacement anyway.
Oh well... such is life I guess.
Dougster