It just seems the idea of going glassless defeats the whole purpose for 8x10 quality. You
might get away with it with a relatively brief cold light exposure and limited enlargment.
But it doesn't take much temp change to deflect the film. Glass can actually supress dust
problems, because if you keep your plane of focus very precise and shallow, any dust
circulating above the carrier will land atop the glass and not come into focus. You obviously have to start with a clean carrier. But merely transfering it from the work station to the enlarger has the risk of attracting dust. Newton rings are a different problem and need correct glass type.