I don`t own a Zoozone 2 but I feel due to the large size, you can`t go wrong. Yes the grill may require meshing, but that shouldn`t take long as you just need some quarter inch wire mesh, a pair of wire cutters, place the mesh over the grill and cut the mesh to size. Use small cable ties to attach it to the grill.
You could leave an inch of mesh all the way around the edge and carefully fold it under, but I could see how this may get in the way where the grill attaches at the back in the grooves....
I would attach the mesh to the outside rather than the inside personally. The grill lid can be removed for better access or just lifted up if you only want to put something in or remove something. My robo is in a Gabber Rex without the grill as I made a wooden framed meshed lid instead. I HATE sliding lids! x