I had a slightly different version:
A:
If contact was broken:
Pour, pin, base, saw like normal. Except using a ceramic pin on the die(s)
Vaseline the base well, Lightcure tray material on the tube to make it mate only one way to the base.( Always had a few measuring devices from investment or stone lying around for such. Could get more than one die per tube if careful.)
Put a tiny bit of wire wax/utiltity wax between the tube and the die at the base on the lingual of the die. This becomes the pouring sprue.
Pour duplication silicone.
Remove tube with silicone and die from base. Remove die and wax from tube. Cut hole in tube where wax was.
Re vaseline base if needed. Put new ceramic pin in base.
Secure tube to base
Pour refractory material into hole creating a new refractory die and the material captures the pin.
Remove tube with new die, grind off sprue.
Now refractory die can be used for fab and originial stone die can be used for delivery check and they are interchangeable on the base and in the modle. No need to worry about chipping the refractory while mounting for articulation.
A solid model was also made by 2nd pour of impression
B/No broken contact:
Same except the entire area to be venneered would be duped, it would be supported in the base by 2 ceramic pins and it would be sawn at the IP of the first non-involved teeth.
Why:
The refractory material is hard on the furnace to degas. The less of it there is, the less wear on the furnace. Our protocols let the furnace need less repair/replace and less preventative maintenance. We had one furnace for the specific and sole use of degassing copings and refractory material. It kept the 'work' furnace freer of impurities and reduced headaches in tracking down problems when they did happen. Less variables, less possible causes.