William,
I'm glad that you like it! I love talking about technique as well. What I don't like about the method described is that it requires a lot of hand movement and a bit of noise. I also have a different timing for the palm. In RRTCM, the authors suggest making the motion of squaring the deck, which is presumably already squared. To combat this, I always palm while squaring up the deck from an overhand shuffle. I've been using the palm from Bill Tarr's book Now You See It, Now You Don't that is more of a push off palm. The RRTCM palm is too impractical. The movement of the thumb is unnecessary.
As far as tricks go, I'm at an impasse when it comes to brainstorming new ones. I'm working on a card to box with a subtlety from Eric Goldfarb that is wonderful. Otherwise, I can't think of anything.