I did do this for my machine. My suggestion would be to trace the cut out on to cardboard. Do you have the out line of your machine? If not maybe someone would give you this from their insert. You need these measurements to be accurate and to figure out how far in the machine will sit from the front of the hole. Once you have these measurements you can take it to a glass cutter and they will be able to cut the material and router a lip for you. You don't want a tight fit, but you don't want it sloppy either.