Only issue with glass is the grade. Light stuff will sag and warp. Either way, on glass components I'd be sure to support them well. Lower fender braces etc. otherwise they will flex and move around quite a bit while running.
Had this issue with the glass on our old Savoy. Bumpers were the worst as they were a thin blade type. Would vibrate pretty well when sitting at idle. Ended up running small rods over to the ends to steady them and support them from deforming too much on accel.