Ahhhh.... (digesting slowly)

The increased rpm over the larger prop keeps tip efficiency up and the broader tip actually increases it. So I can cut props till I find what I like. Finally...The cut down props would be equal to an uncut prop of a different size and pitch, but it would be difficult to determine which one without just trying different props. (and the actual prop may not be made..which is why I would need to keep cutting?)

I'm not putting words in your mouth, just summarizing what I think I understand.

Thanks for the well thought out explanation.