Once the plastic is ready quickly turn the vacuum on (make sure it is within quick reach!). Using your gloves, grasp the frame on either side of the material with both hands and remove it from the oven. Quickly position it over the vacuum box making sure it will cover the forming surface. Keeping the frame as level as possible thrust it down over the mold. It is best, especially with tall parts such as a spinner, to push the hot plastic over the mold very quickly. This creates a seal and forms the part almost instantaneously, which helps to prevent webs from forming. It is better to use a generous size frame and material and make sure you cover the entire forming surface of the box. You will end up with some waste but the plastic is fairly cheap and gives you some room for error when aiming to cover the box. The spinner here is 4.5 inches in diameter and about 4 inches deep. This particular one was formed from .030 styrene, which is adequate, but .040 would have been better. This is another area where experimentation is needed in order to gain experience at judging what material thickness is best suited to your part.