I don't see the need to spend another 150 for the USA PTO shaft. The one that ships with the unit is fine. I did a slight modification to the gearbox - added a .040" shim (a inside snap ring on the shoulder of the main shaft) to quiet down the bevel gears and in hand tests it is now very quiet since there is no snow I took the blower off and have the rear blade on now.
The other thing, is the steel frame it ships in makes a great platform for a dolly. I got 8- 5" casters on ebay for $50 and used the top of the frame to make a dolly for the backhoe, and then used the bottom frame for a snow blower dolly - so I can roll the SB to the back of the tractor and hookup - same with the BH.
All in all a very well built snow blower but it doesnt appear it will get any use this winter as we are heading south from mid Feb to mid March.