Betterley Tru Cut table saw insert question

Does anyone own one?
If you own one is it worth the $80?
What are the dimensions of the phenolic inserts?
Thanks
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Replies
Just to follow up in case someone Googles this thread
From Knots Forum:
1.894 X 9.875 X .250 +/- .001 on thickness.
I make my own inserts, using the original as a template. The originals are about .005 too thin if you are doing very small rips.