To merely answer your question, Daryl teaches a convincing one-handed double lift on his Ambitious Card Video. As stated earlier, I believe the same sleight is taught on one of his Encyclopedia volumes as well.
And with that said, if people are catching on to your technique, it's my opinion that you should always analyze how you actually perform before you pass off an excuse to hide your shortcomings. If people can see a flawless double-- guess what-- it's not flawless. To resolve this issue, I suggest further masking your technique with logical timing and misdirection. Whenever I perform a sleight such as a palm or double, I generally deliver a line to take people's eyes off the cards for a moment. This should seem like common sense, but it's almost alarming to see how many amateurs choose to do things the hard way with their hands being burned the entire time.
If the move is properly executed, it shouldn't be seen at all. For instance, in an Ambitious Card routine, just prior to palming the card to a wallet for a finale-- I'll put a lot of weight and suspense into a specific moment... only to turn over an indifferent card to show that nothing happened. This naturally creates an amusing relaxation point, and instead of manipulating the cards-- I manipulate the timing to get away with a sleight as bold as a classic palm. The spectators naturally don't see anything and yet they still believe they were burning my hands the entire time.
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I feel like too many people these days focus on the mechanics of magic rather than the art. There's so much more to the craft than the sleights necessary to create an illusion. The presentation, timing, and flow are just as important as the moves. These days, it's difficult for people to grasp that-- they get so caught up in the latest trick and latest sleight, thinking that such things will improve the experience they're trying to create for a spectator. They won't. The only thing, in my opinion, that will truly make for a dynamic experience is old-fashioned social skills. Communication, theatrics, etc. These skills will make the experience much more entertaining than your offbeat use of the pass or a fancy one-handed double lift. Lay audiences couldn't care less about any of that anyway.
Hopefully, that makes sense. It's something worth thinking about.
RS.