Listen kevins stuff is not impractical, people just have different "comfort zones" like the card under box trick some dont think its practical to palm a card and load it right in front of a spectator so they will use a dupe but in all reality if you put the practice in to working out the timing and misdirection then it is a killer effect. and some off kevins effect our like this so just think about this before you buy an effect that does not come with a gimmick that does everything for you, this is just my opinion.
CM