Oskar
I´m above 30 I´m sure but I don´t know exactly, could be just shy of 35. Maybe I can measure later. I always freehand.

My experience so far is that one can go even higher, maybe 35 or 40 since when clearance runs out its time to sharpen anyway. That is, dullness become an issue before clearance does.

I´ve been reading a lot here lately, thanks for posting this flood of interesting observations David!