I've been casting in silicone a stiffer mold for melting down scraps, I'm hoping to use some plaster of Paris to act as a better weight, with some embedded rods to act as integrated spacers. Hopefully allowing it to press to a more even thickness. One concerning thing to note is that the center of my earlier melts was very thin, and the result was brittle. I'm hoping this was simply caused by the silicone being too thin to resist buckling. This will likely be the most annoying aspect to nail down...
Yours truly,
Ayydan
Ayydan