I would forget about the clamp on brake and drill the fork. Round blades don’t really brake that well, mind, but you’re not building this for track so why not have a nice neat brake instead of that monstrous thing?
I thought about it, and maybe one day I might. My conclusion is that it'd be wrong to drill the fork as a starting point. First I build it up, then ride it, then see how much I love it, theeeeeeen one day maybe I think about drilling.
I would forget about the clamp on brake and drill the fork. Round blades don’t really brake that well, mind, but you’re not building this for track so why not have a nice neat brake instead of that monstrous thing?