I’ve been using MakerBot products for several years, and this is the first time I’ve ever ran into a model that won’t go through Makerware. It’s a car model I got off Thingiverse. Long story short, it I cut it in half to print larger and then join the halves after printing. The model is clean and no holes, flat surfaces down and after 45 minutes the preview of it is empty. Here’s how it looks. Any suggestions guys?