No plastic resin materials cast as easily as wax, which melts and flows out of the mold instead of sticking in there and burning, but some cast better than others. If you need a machine that builds models in real wax, the only one I know of is the Solidscape, but that's outside your budget range. I've had good luck with the B9 Creator, which uses a resin that burns out pretty well. It helps to use Plasticast investment, which can tolerate a little more heat than normal investments, and to introduce a little extra air into the kiln at the last stage of the burnout cycle. You might try that with your Projet models before giving up on it. But if it still doesn't work, I've got an extra V1.1 B9 I can sell for $3k.

Andrew Werby
www.computersculpture.com