Eaton Bonzer fin angle

Aloha, I did search but got varied answers.

Just picked up a Eggy Eaton Bonzer. It has the plastic side bites that I want to replace with glass ons.

I checked the fin angle I got around 25 degrees angle. Does that sound correct?

Mahalo

Apparently it’s not super critical, anywhere from 18-30*
I think there is all the info in this thread?