When in doubt, build a piece of $#!t

It seems every piece of equipment needed to produce metal castings costs at least $300 bucks. When I started out I needed a wax injector so this is what I came up with from crap I had laying around the studio. It is a cup from a paint sprayer sitting on a cheap electric burner which provides the heating element. Some brass pneumatic fittings hooked up to an airbrush compressor for the air pressure and a meat thermometer for the temperature gauge.