Projet 660 if I remember is the new name for the ZCorp plaster machine.

Any distortion has nothing to do with heat, that's not how this process works. It's the mass of the binder infused geometry sinking into the powder bed. There was a function to create supports to stop this happening on the machines I had, or simply print some support pillars that don't quite touch the underside of the model. This will stop the parts shifting.

Shrinking happens as the parts dry in their green state and can be compensated for. You need to use the on board heating to dry the part to make it removable or you risk breaking the parts.

Hope that helps,

Rich