Harry Lorayne's "Sting" (actually the Walt Madison trick with normal cards) is a great trick. The one weak spot in the routine is the penultimate display of the piles. You show R-B, R-B, R-B, X-X and X-X (ie, hide the last state of two pairs). The fairness of the first three makes the lack of display of the last two pairs suspicious.
My solution to the problem is to take a break between the 1st and 2nd card, just before you add the 2 X-X pairs. After adding them, I do a semi-side steal, shifting the bottom packet of 5 to the top. It's not a pass as I edge pinch the top 5 cards with the left index finger, move the left hand forward while gripping the bottom five cards between right pinkie and right thumb, and then deposit the bottom 5 cards on top. I know it's a move in an otherwise moveless routine, but it then allows me to show the top 4 cards which the spectators obviously didn't see.
I was wondering if other people had better solutions?
Bye for now