Got my 2" receiver hitch adapter last week and used it over the weekend. The
Experimental Attachment Key Lock works great - far easier than the pins,
and with a suitable attachment, should be easier to keep with the hitch adapter
than the 2 pins. Great idea!
I'm going to try a long, loose zip-tie to attach it and keep it from getting lost. Might
need to go to a small wire like Deere uses for the pins on the JDQA frame.