I needed to drop my Bushhog yesterday and pick up a rear blade. The Bushhog can be a bit of a PITA although dropping it on planks so I can slide it to clear the lift arms helps. Yesterday, to my initial surprise the first arm came off easily. WTF? Then I realized the lift pin was slightly loose allowing it to pivot just a bit.
I prefer a clevis mount on implements but realized that manufacturers could make life much easier if they had pivoting pins that could be locked in place after attaching the tractor. Of course, then the sales of quick hitches might go down. . .