I guess I don't understand, I hitch, get out of the truck, flip a tab over the latch, insert and lock a padlock, loop the brake cable over the latch handle, insert the Butch shaft, plug in the elec. cord and that's it other than replacing the tonneau cover side and closing the tailgate. The trailer cannot come off the hitchplate with Butch's catch and therefore cannot drop.
You flip a tab over the latch, insert and lock a padlock. That assures your pin won't come loose and drop.
What's the point of Butch's product? i.e. why did you buy it (or make it)?
Actually, I see that OldCoot did answer that in his last message - "in case the latch breaks". With my B&W, there are jaws that close around the pin, but it's still held in place by a small pin. I could see that being a potential failure point.