Dai Vernon's "Penetration of Thought" (THE DAI VERNON BOOK OF MAGIC, pp. 51-58) involves two packets of four identical cards from two different-colored decks. A card is thought of and a packet named. The thought-of card now travels to the named packet, leaving one packet of three cards, and one packet of five cards (the extra card being the odd-backed selection).
John Bannon's "Twisted Sisters" has its roots in the above plot. In Bannon's trick, two cards are thought of, and there is an extra kicker of the other cards "transforming" into jokers.
I am searching for the trick that, developmentally, came in between these; the trick wherein there are two selections, but no kicker ending.
The Double Brainwave plot is certainly related, except it uses 52 cards, whereas the trick for which I am searching uses only two packets of four.
Any help is greatly appreciated. I am fairly certain my writing made no sense, so if you need clarification, please ask.