If you tap your fingers on the surface as it’s lying on the honeycomb, you’ll quickly learn to tell the difference. Where it’s flat on the tray it will be more of a “thump,” and where there’s a tiny bit of gap you’ll get more of a “click.” I keep adding pins/magnets until I can’t find any areas that click.
Here’s the results of my tests - 1/4 hardboard, Home Depot:
Looks like Speed 125, 1 pass, full power is the winner. Just cut 4 push sticks for the table saw, they all cut cleanly through.
The first 100 was shooting flames (obviously) the 2nd one didn’t, so I guess it’s a crap shoot as to that flammability of the material where you cut it. But thankfully I can now create some awesome jigs for the table saw.