Re: 445 Rear PTO
The PTO and the lift are separate, meaning the PTO is a standard 540 rpm, and will have a standard spline stub for 540 rpm implements. The lift can be Cat 0 or Cat 1, the difference being the size of the hitch pins on the implement, and the size of the hole in the respective hitch balls. Go with a Cat 1 lift if you can, because you can put sleeves on Cat 0 pins and use Cat 0 implements on a cat 1 hitch, but not the other way around. The 445 should be able to handle the same size implements the X4xx,X5xx and X7xx can. At 22 engine hp. you'll have about 15-16 PTO horsepower, which should give you enough to operate a 48" or so rototiller.
As tight to the tractor (short lift arms) as the implement will be, you'll likely have to shorten the supplied drive shaft of whatever tiller you get. You also want to add a slip clutch at best, or a shear pin at least, in the driveline.
'09 JD 2520, CX200 loader and 62D deck
LP RTR0550 rototiller
?? 60" box blade
Simplicity 10" plow adapted to 3-pt hitch
3-point PTO DR wood chipper
'02 JD GT235, 48C deck
'84 JD 318, 50" deck
'86 JD 214, 46" deck
'86 JD 212, 38" deck
'08 X748SE, gone but not forgotten