I wanted to check Max out in NYC, but it wasn't practical for me at this time.
Many of his clever ideas rely on equivoque and/or clever outs. Kurotsuke is one of the classics of this, as is his Positive/Negative coin force. I agree that the given Kurotsuke resoution is not obvious to everyone. It takes some management and timing to pull off.
These kind of endings provoke a lot of discussion, but I've never been too happy with most of the alternate solutions given.
Anyway, I've come up with an ending to Kurotsuke that has been well received by working mentalists. It is actually one of the simplist, most convincing (and also fun for the specs) resolution that you could do.
I'm including it (and my own Positive/Negative outs) in a booklet I'm writing about my take on mentalist standards.
These are only my variations/"improvements" on the effects, without actually revealing the published methods. So it's for experienced or knowledgable performers or collectors.