Dremel tool advice needed

Most plastics don't take well to high speed cutting, they melt rather than cut.  I'd be thinking along the lines of a fine tooth keyhole saw.  Drill out a starter hole and carefully cut it with a hand saw.

Dremel does have a jigsaw attachment, but I don't know if you can dial it down slow enough not to melt the plastic.

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I have a Dremel 4000 and a battery powered Dremel 8220 that I've used it with, but only on wood to date.

Would you share the info on the meters? AC volt and amp meters in digital are hard to find.

Yes, the 10 Amp meter was item # 171358955425 sold by elite.element for $10, and a 5 amp version item # 371789757183 sold by georgio11115.  I confirmed before buying that these current meters did not require external thermocouples. I have tested them and they work well but I can't vouch for calibration accuracy.  Search "digital blue LCD" to find a variety of the products offered.

Thanks, Gary. You found voltmeters, too?

Bosch makes saber saw blades specifically for "plexiglass, acrylics"and they do work great.