Don't worry, I'm far better at PCB than any of the other Touhou games (it's my favorite, and I definitely play it the most). Plus, despite the games' overall difficulty, I truly still think it's the easiest to no-bomb, if only because of the borders. There's no way in hell I'd try no-bombing any of the other games, because I'd get completely butchered.
And as far as the borders go... there's not much one can do about the unintentional ones, unless you suicided everytime you broke one (which would be amusing to watch). It might be a little cheap, but not using bombs is still about 30+ less bullet patterns you're allowed to fail, which is plenty challenging by itself.
I think there were only about two of them in the whole run anyway, and one was to Hell God Sword which I ended up dying to anyway.Edit: God, looking back at the run I had an absolute shitton of broken borders...everywhere. What a sloppy run. Meh, whatever, maybe someday I'll go completely insane and try to make a better one.