I believe the simple answer is yes. Unless all of your implements were designed to be used with a QH. Because my real problem is that the implement, in this case a locally made box blade, was definitely NOT ever intended to be used with a quick hitch. So the top link frame of the BB is so fat from front to back that the QH top hook does not stick far enough out from its mounting to engage the top pin of the implement. And the "N" dimension of any and all holes in the top link frame is random, certainly NOT the specified QH-compatible 14.78" - 14.88".
So if your implements are not designed to be QH compatible, and even if they are in some cases, you are forced to make some mods.
Pat's QH, that only attaches to the lift pins, avoids all of this, but then you do still have to manually connect your top link.