I joined this forum and got interested in casting for a specific project. Making an end cap of aluminum. I was hoping to run a very rough outline of my plan by anyone interested here on the forum and hopefully get flaws or pitfalls pointed out. 1. Build a very basic furnace - charcoal in a steel bucket with a hairdryer kind of thing. 2. 3D print the part and make a plaster cast. 3. Cast an oversized shape that I then bring down to size with hand tools. Is this a reasonable plan to get a solid chunk without a bunch of voids? What should I consider to be able to pull this off? The cap would look something like this.