Below is a link to a Kickstarter campaign that requires a whole printer to do what Discov3ry apparently can do as an add-on. That's the bad news for minimetalmaker and good news for Discov3ry.
It's also terrific news for me. Apparently, as stated on the link, metallic clay can be made at a reasonable cost.
I'm more excited about metallic clay than any other material that's been suggested. Electrical conductivity property kicks open a HUGE door for applications. Please spend some time thinking about that.
Is it feasible for Discov3ry; can you do it?