I should probably explain my fetish for having receiver tubing on most everything.
I've put them on regular blades, box blades, trailers (front and rear), you name it.
This allows my to put just about anything anywhere, and only need a few pintle hooks and tow rings. For example, that rectangular tubing sleeve at top left makes it possible to use 2x2 1/4" wall tubing to extend the tongue of a trailer, or the reach of my "sky hooks" (that's a different story, those go on the loaders).
I have also made a few other gizmos. For example, this one can be used to raise the effective tongue height of a trailer, or lower the height of a receiver. It's kinda like a big Lego, but for towing stuff.
For regular road use, it's almost all gooseneck trailers, and a few with a tow rings. And while I have a few of the multi-ball ballmounts, I never use them. If for no other reason, because most have a ridiculous 7/8" ball on them.