I just squeezed the plate down on the mat and it produced depression. Created first set of holes on those. Flipped it over and increased the size. Should have thought of a template.. easy enough to do with a paper and then use soldering iron.. next timeHi Hermitdave,
I got one after our discussion. Hard to line up the screws - needs a template! Soldering iron sounds like a good idea. I am pleased with the result though. Looke like the MG matt will now last for a reasonable amount of time.