Hmm...you might be onto something Damon. They do look a little bit like the Scotty pedastal base in the link above. The part I'm referring to would be the very bottom piece of the three stacked up pieces show in the picture. And it's entirely possible the inserts on my bases are just as you've said yours are. I was going by memory because it's pouring outside and I was too tired (lazy?) to go back out and look again before I posted.

Braz