Just to update those who care... on my Cub 400 Tiller with the JeffinPa Sleeve Hitch to 3pt adaptor all I can say is WOW.
You've already seen this pic, but I am going to be like CAD!
Did run into a problem though, first 2 minute of running there was a clanging noise, shut it down immediately and found the center/middle shaft in the gearcase had worked itself out and the gear was now off. Ouch!
With some discussion with Joe Knight, (thanks Joe), I ripped it apart and spilt the gearcase to find a total lack of any lubrication grease at all. Like none. Also, the two bushings on the middle shaft had completely failed, and looking at some tarry, solid grease material at the bottom...this had happened awhile ago with little bits of brass lodged deep into the tarry mess.
Gearcase as is, no grease.
Bushings, note the bottom one is a new one bought from my Cub dealer in town, the other two are the old ones. One is completely torn apart, the other 95% torn apart. Nice
While I was in there, decided to replace the two main bearings and oil seals on the bottom tine shaft as well, they were fine but I don't plan on doing this again. The tine bolts were bad, wore pretty badly, and had ovaled out the holes in the shaft. Recommend to anyone who has one of these to check those bolts for wear and replace before the they oval out your shaft as well.
The middle gearcase shaft was OK-ish. These are NLA, so I took some fine emery cloth and worked it all around to smooth out where bushings damaged it a bit.
Put it all back together, filled with 10lbs of grease, new gasket and a few new bolts where some old ones were bad.
Will post some action shots. This thing rocks! Put on free-float setting on the sleeve hitch and she digs as far as I will let it! Hitch adaptor from Jeff is absolutely A1 quality work.