Swinging Tray

Here's the initial setup for the shot. To measure out the tray, I put the 3 ball with its edge even with the pocket cut on the centerline. I freeze the tray to it (where the 10 ball is), then move the 3 ball and rotate the tray into position. The cue ball's right edge is even with the 3rd diamond. Notice the position of the striped balls in the tray. This will act as the pivot point. (Figure 1)

I center the rack on the 1st diamond on the short rail. The edge should be pointing about to the 3rd diamond, where the cue ball is. (Figure 2)

I aim for the empty slot at the corner of the tray. A little right english helps the cue ball get around. The speed you need is just to open enough of a gap between the tray and the rail for the cue ball to squeeze back through. If you hit the rack before hitting the short rail, aim thicker into the tray. Bear in mind changing your aim point can also change how much the tray swings though.

Video: Swinging Tray

Figure 1

Figure 2