Hi Jef
Quick and dirty way to do this.
As shown in the picture below, just put all of the clips/pics at the top of the main track and resize, move, etc… everything at once with Track Motion. Make sure that they are all of the same size. Every time you’ll drop a pick/clip in that time line, it will automatically go to the box. (make sure that your cursor is at position 0 on your timeline before using Track Motion)

And here’s the result:
https://youtu.be/q-1f0Tpp5IY
Cheers !
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\’\’When the cutting stops, the editing begins…\’\’
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