Ok yes I admit it was nit-picking.

I have another question - Does Ortiz have his own [published] stack? I am having trouble finding details. Or does he describe tricks that can be done with any stack?
Actually that leads me to a more general question: there is a lot of debate about which [memorized] stack is best.
What % of published tricks will work with any stack?
And what % are specific to a particular stack?