u/NelsonQuant667

Hey guys, I’m finally getting the things i need to start lost wax casting. I have 2 questions (so far):

Does my flask need more room in the kiln? I also need to raise the flask slightly to let wax flow out, right?

Also for the vacuum part of my set up I’m planning to cut a steel circle to replace the clear one on my vacuum chamber. How much larger should the hole be than the flask to allow the metal to expand and still fit? For example for my 4 inch flask, should the hole be 4.1 inches in diameter? Or more?

Thanks!