A revised version of Ken de Courcy's You'll Get The Point!.
Why the extraneous procedure of changing packets? To Ian, this seems totally unnecessary, although (obviously) the mechanics of the trick, as is, necessitate it. This effect is almost exactly the same as the de Courcy contribution, but the method is altogether different.
1st edition 2018, 2 pages.
word count: 760 which is equivalent to 3 standard pages of text