A solution to NOT drill your track forks and have a normal front brake nonetheless

When the brake contacts the front wheel it will pull this mount forward - I doubt the SFN would resist that force sufficiently, I see the whole mount being constantly pulled forward and down.

EDIT, but I like the idea - and your render.

Not sure, it's something that needs to be TESTED ;-)
From my experience, ahead starnuts are f*ckin' tough and get even tougher when you pull them (that's the idea behind them), - AND - you could actually use 2 or 3 of them in a row.

The hole would need to move up as the mount is further forward than a normal hole - and the further you get away from the fork the wheel rises (until it's apex).

if the steerer angle was 0, then yes, otherwise it should not rise?