Add artifact brim with single extruder


Hi, I am trying to print a large square platform (200x200x50mm3) out of PETG but am facing a lot of warping issues. I have tried to add a large raft but it still lifts up at least one corner. I was thinking of maybe adding a brim around the model to try to keep the temperature stable. This could be done via the artifact option but I can find a way of forcing Voxelizer to add one when using a single extruder. Is there a way of doing this?