I ride with the Patriot Guard and bought a flag pole attachment for my Rivco tow hitch. I didn't like the flag pole that was made for it (seemed a little flimsy) so I went out and bought a much sturdier steel one piece pole. The pole is too small for the receptacle. So, I found a piece of PVC that fits the pole perfectly, but it's 2/10ths of an inch too thick to fit in the receptacle. I tried using a piece of sand paper to 'slim' it down, but I can see that's gonna take a LOOOOONG time.
So, I'm hoping some of you will have some ideas on how to reduce the girth of this adapter.