I purchased Roy Walton's Restless Colors at an Aldo Colombini lecture a few years ago.
When I began examining the routine I asked a few questions.
Instead of the Hamman Count can I simply spread the packet between my hands?
Yes. It's more visible and visual.
"Could the mechanical pull-down and cut combo be changed."
Yes. Allowing for an immediate Color Change.
"Can it reset?"
Yes. And instantly!
If you can do an Elmsley Count you can do this trick.
Comes complete with cards and wallet.
Video and written instructions included.