This is also often called the Hofzinser Cull or Spread Cull, developed by Johann Nepomuk Hofzinser. It is a very versatile move and the grandfather of the Convincing Control.
This is a very clean force of a card close to the top. Allan also shares a subtlety by Jimmy Grippo to make this force look even more convincing and fair.
Ackerman marries the Kelly Bottom Replacement with the Convincing Control to eliminate the telltale front finger movement of the Kelly Bottom Replacement.
The bluff pass is a very nice way to get a selected card to second from top when it looks like that you are burrying the card in the center of the deck. Allan also tips a bluff Kelly replacement - something to fool your magic friends.
This multiple shift is by Ed Marlo. It operates in two phases where in the first phase you bring the cards together that were inserted in different positions in the deck. And in the second phase, you bring these cards to the top.
Here you control several cards, say the four aces, during an overhand shuffle. It also allows you to get a break under the cards you control. This can be exploited to top palm these cards. This means you have not just controlled several cards, but also removed them from the deck.
The thumb fan is not just a nice display of cards but it also allows you to hide a block of cards. It is therefore not simply a flourish but an actual move that achieves something. Allan talks a bit about the philosophy of flourishes. Should you do them or not?