I have a box full of 2 pound lead ingots, and I want to make them into pucks so I can put them on my kart when needed. I have a melting pot that I used to use for making fishing lures. I should be able to get 2 ingots into each pot, maybe a little more. What can I use to get them nto the shape of the pucks? I have read muffin pans, but I am curious what other people have used. Also, I would like to avoid having to drill a hole afterwards, so what can I do to have the in place during the pouring of the lead. Thanks in advance.