I love your project! I have an old Haban mower made to belly mount on a Simplicity originally. Also have a left over hydraulic drive motor from a 224 I thought about using, but someone told me that would be a bad idea. Can't remember why now. My main concern is getting maintenance parts for the mower, because the best I can tell, the 2" wide sickle sections are obsolete and unavailable. Same with the rock guards. I did find some spare used ones from an old David Bradley implement, so I may try this anyway.
No need for me to lift the bar vertical under power, although this one will operate that way. I just planned to use the sleeve hitch to lift it enough for making turns and such. I don't mind getting off the tractor to raise the bar to transport position.
If I can make this work out, the next project would have to be a hay rake of some sort. I'm thinking a wheel rake, like the little "Estate Rakes" sold by Agri Supply and others. http://www.agrisuppl...-wheel/p/41439/
I doubt if that would handle stuff tall enough for real hay, though. I'll take a look at cutting down a full size wheel rake, too.
Sorry for the thread drift. Back on topic, my Haban would need a pretty thorough restore before being put to work. For that much effort, I think it might be worth going ahead and converting it to 3" guards and sections, which means a whole new cutter bar and increasing the stroke to suit. I'm thinking about actually making hay with this.