This might be a dumb question....
So I am supposed to cut the old fork right?

Any guidelines on how much to cut off? Or where? Or am I missing some obvious way to get it to slide over the old threads?

Also, how do I cut the "steer tube" extension so I can get that slammed look? There seems to be a seam at the perfect spot, and looking at the drawings above, it seems like it should separate there.

Sorry for being so dense....