This might get a good reaction (I won't know till I've tried it a number of times). The method is
interesting, and the However, it is a bit too procedural. The tutorial is somewhat confusing. He
should have provided a full performance. I had to try it several times before I figured out what to
do.
I was also confused by the tutorial, and I'm not going to take the blame.
One thing for certain, Regal's method uses a table switch with no alternatives.
I recall Karl Fulves' "Mental Magic" papetback has a neat load for bottom of the deck: cards to be added are hidden in a tall, clear cup behind a large prediction card and then the deck in front.
So audience sees deck, then, say, a prediction, index card.
But all of that in the clear glass hides a load of say, 4 aces.
Pull out the large prediction, index card --and this move automatically adds concealed cards to a shuffled deck.