I'm trying to figure out why my model, which has a square-flat base, shows a triangular raft in Makerbot Print preview and also prints that shape. On an earlier attempt I successfully printed it with a square raft but it warped the model. I want to print it again maybe using side covers on my Replicator + (for temperature control) but this raft problem is stopping me. It looks perfectly smooth when I inspect it in Photoshop 3D.