How to create a smooth continuous panning transition from clip to clip in a loop

Here's how I just did it. There's probably a more automated/easier way but I'll put this out there in case there isn't:

1. Place the initial clip on V1. Set the Motion->Anchor point and Motion->Position to zero. This makes it easier to work with the movement vs the normal anchor/position values that are relative to the center of the frame.
2. Set a Motion->Position keyframe on where you want the pan to begin. Scrub forward to where you want that clip to be completely off the frame and set a second keyframe there, with the position value set to the negative value of your video width (-1920 for HD for example). This will place it completely off-screen to the left.
3. While still in the Effects Control panel, navigate to the first keyframe you created using the keyframe navigation arrows to the right of the Position property. This will put the sequence playhead where you want it to be for the incoming clip that will "push" this clip to the left.
4. Select both keyframes (click-drag around them) and then copy keyframes to clipboard.
5. Place your incoming clip onto V2, snapping its left edge to the playhead (which is aligned to the first keyframe from step #3).
6. Select the clip you just dragged by clicking on it, then go to Effects Control panel (Shift-5). Set the Motion->Anchor value to zero. Paste the Motion->Position keyframes that you copied from step #4. Navigate to the first keyframe and set its value to the video width (1920 for HD). Navigate to the second keyframe and set its value to zero.