mmm... this was dug up from almost two years ago !!!
and it almost borderline gives the trick away, IMHO

oh well we still love you siege.
But, as AC is my fav trick. . . .
I find alternate springs will fix the problem of the bent card, meaning one spring face up and one face down. this can be done after the spectator grabs his card from the top of the deck in unbelief.
I've found a sweet spot in deck wear with AC. too new a deck and the bent indifferent card will still stand out. but with too worn a deck the DL will be near impossible to do consistantly. NOTE there are several DLs that can be done easily regardless of deck wear. I'm referring specifically to my favorite, the push-off DL. By all means if you prefer something else you could let the dog chew on the deck for an hour or so an the springs will be more than enough to restore a casual appearance to the deck. springs are also easier with a worn deck.
PS I normally wouldnt say this but, seeing as the post is two years old, doesnt it seem obvious this kid never saw the instructions
PPS sorry if the original poster is still around and is legit but I would be VERY surprised.