I've had 2 Quick Hitches -1 from Pat's Quick Hitch, and one from Harbor Freight that looks much like the one advertised by Northern Tool on these pages. One I returned, the other I sold. Here is why:
1. Both hitches extended the connection point by 4". That required re-working all of the PTO shafts to ensure each shaft was interconnected by a minimum of 6".
2. That same extension of 4" had me worried over issues of leverage and wracking. You mentioned you would be working with a box blade - an implement that takes a lot of abuse. For that implement especially, your tractor would probably appreciate a direct hitch arm connection,
3. Many times, I had to climb out of the tractor to make adjustments. If I've got to get down off the tractor, I might just as well make the connection.
I found that time spent studying how to speed and ease the connection, was time well spent. For example, the front wheels of my 3pt finish mower, rest on a small deck made from 4x4's. This allows me to swivel the wheels and roll the mower left to right. My rock rake connection point rests on a small pallet standing on edge, holding the front just at the right height for easy connecting. And the box blade is centered over a 6' 4x4, which allows me to rock the blade, front to back. You get the idea.
