I like the idea but This trick is overly complicated. The gimmicks included are totally not needed.
I use a packet of 21 cards and place 2 of the same cards 10th & 11th from the top. Then I
use a 10-20 force & a prediction of 2 cards which can be duplicates. Lastly I reveal all blanks
except for the chosen cards! With this method you end absolutely clean and don't need complicated
awkward or unnecessary gimmicks.
In my opinion the trick is way over priced but the idea
is good. David Forrest is a great magician but he makes his tricks way too complicated.