Carbon fork, which one?

While it makes sense to get a road fork for use on the road you will be hard pressed to find a road fork with a 30mm rake (or even worse/better a 22mm rake as per OP original fork)

Find an industrial sized oven, lay a heavy block on it, and leave it at gas mark 6 for 2 hours. Job done

And are most forks built/designed that specifically to the point they would break on the road but not the track (i.e bumpy surfaces etc,.) ?

I was considering comfort when I recommended a road fork. I'm no trackie but I'd expect them to be overbuilt if anything. These traclies have no respect for good honest weight wheenie-ism ;) . Mitretester mentioned lack of drilling, which is a pretty decent point.