I never did use break-in oil but my engine had LOW-tension rings, a mild crosshatch (borderline shiny) with a steepish 50 degree included angle. It also has coated skirts so if there was some rockin' under load, it shouldn't damage the walls (at all).
So, primarily because of the rings and crosshatch, it needed mechanical loading EARLY in it:s life. I could look it up but it was several w.o.t. runs starting at around 100 km. (?) after initial startup. If I hadn't built it like that, I would have used a break in oil.
I hope yours has a long and happy life!
And you too!! Good luck on the healing, after your wreck!
Ronnie