Hi Mike

Thank you for your observation.

I think that you are correct.

According to Wikipedia, "a crown gear is a type of bevel gear where the pitch cone angle is 90 degrees."

Thanks to you, I now see that some columns of both of the excel spreadsheet are hidden, for example H39.
To unhide bevel gear excel columns, highlight columns C and L, right click, and select unhide.
There are a bunch more formulas.

The tooth shape of the gear seems a little strange to me.

I'll have to do some more investigation, comparing the crown demo with the bevel demo.
I'll have to try changing the bevel excel sheet to "flat," a pitch cone angle of 90 degrees.

Brian