Here is a video I made to show my students. I hope you can view it. It is about vacuum casting pewter. I have tried all kinds of casting methods to get pewter to work for me but none of them worked that well. When I used centrifugal casting the pewter would run back out of the mold about half the time. Then I finally bought a new vacuum with a casting side, and I love it. The flasks are 100˚ Fahrenheit.
If you have any specific questions let me know.