[jda]

I don't recall seeing any " space". Looking "up" at a reinforcement ring; there is "no space" there for a 'shim" Is There?
Is there "space" all along the underside of that ring? What would happen if you pull the shim (is there 1 or 2?) Out?
Reminds me of sticking a "match pack" under a table leg (remember doing that?) when a table wobbled.


Might that ring been vibrating and someone stuck the proverbial matchpack " in this case a piece of wood shim" up/in there to stop noise?
I don't think it belongs there (lol)
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I would certainly show this to the guys over at DFO. And get their read on it.
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The last picture (5) looks like there is "no space" for the shim. So Maybe yeah a quick fix (for an open-space flaw) from the factory. It would be the first ever seen; unless the guys at DFO have seen it before..
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Or leave it and look at it this way : " You got extra wood" (!!