Once I get these dining table halves flat again(long story, and also in another thread), I'll be using my vacuum bag to veneer the tops. On any other project I've does this on(all have been smaller), I've never used a bottom platen. I've always just wrapped the panel in the mesh, and stuck it in the bag. I was reading on joewoodworker's website that you need to use a flat bottom platen in the bag. Do you all use the platen, or do you just throw it in the bag and be done with it?