See if Soundguy and I get into an argument on this again.
Here is why I do not have a pin on, on my tractor now.
SOME ORC's cannot hold the torque of a high torque implement (PHD in my case) and they will act like (I did not say substitute for) a slip clutch. In other words, when I had the particular pin on ones on my tractor, it would not operate or PHD, it would just "slip" I tried 3 different ones, from two different places and all the pin on ones did it.
That said, my quick release one that is there now, works my PHD just fine and stays pretty permanently on the back of my tractor.
Other points to ponder.
We have a landscaping business, so we run a PHD all the time. You may never run one so all this may be moot too you.
Something else I have been doing with my quick disconnect one is that I have a
chipper with an extremely short little drive shaft. I want as much engagement of the shaft as possible so I left it a tad longer then maybe I should have, and what I do is release the QD on the ORC and push it forward (towards the tractor) slide the
chipper drive shaft on, then slide everything back and lock it into place.
Good luck with whichever way you go.