Hi, I'm a newby to this site but not to magic. I've discussed the pack of card v the packet trick with many friends and I don't agree with the usual stance of cards having to come out of a pack to be effective.
I use a number of packet tricks and also a number of faked decks and if they are used properly you don't have any problems.
Twisted Sisters is to me a brilliant packet trick, and because you finish up with the two chosen queens and six jokers no-one expects or presumes that the cards should have come from a full deck.
Maybe its what you say when you introduce the effect

but I don't have any problems with any of the packet tricks I do, or for that matter, fake decks.
I always begin with the Nudist Deck because I've done it so much I cannot fail, and it has one hell of an impact when all the cards return to blank. When I return to doing a card trick several tricks down the line, no-one questions using a different deck cos the last one going in my pocket was useless (blank).
Tenko.
Yorkshire, UK
Male, 55yrs old, Retired.
"I don't believe it" Luke Skywalker
"That is why you fail" Yoda