I made a set of four targets each in 1/4" and 1/8" plywood. Each target is a 1-inch square with a crosshair and two concentric circles and a letter (from "A" to "D"). Whenever I need a reference point, I have Lightburn fire a point and set a target under it on the honeycomb.
I haven't yet - but I did consider - that the target squares could be put on both the file and the honeycomb board for easy reference.
Anyways, HTH.
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