I discovered this by accident. If you have an ESP deck in cyclical order (25 cards) and you in-faro (any number of times) the top 12 in the other(bottom) 13, you end up with a deck in a new but still cyclical order. This is quite useful for some effects if you want to give the impression you're shuffling the deck but need a cyclical stack. I asked Mr. Maven himself if he knew about this and he said that Stewart James came up with this. I patiently looked throughout his files but couldn't file a reference. Does this ring a bell?

I think it's called the stay stack.
Alex

I may be wrong but I believe a stay stack is a stack which is in symmetrical order: 1,2,3,....,x,x,....3,2,1.(Even number of cards)

The order I am talking about is 1,2,3,4,5,1,2,3,4,5,(repeated 3 more times).

When in-faro'ed you end up with a different but still cyclical order...