Just to verify. You have an Accucut GrandeMark2. This one folds up and uses cutting plastics. If so, this is the same unit as the Accuquilt Studio 2 cutter, but with different decals. If this is the case, just buy the Go! adaptors from Accuquilt:
https://www.accuquilt.com/accessorie...-adaptors.html
If you have an older Accucut Mark 2-3 or 4 machine. These machines cut directly into the roller. They don't use cutting plastics. My cousin has one and what we've found works is don't use the tray, cut a piece of 1/4" plywood, a Go die and a Studio/GrandeMark cutting plastic.