Hello everybody, I have been asked to make 2+ 25 gal terracotta pots for wine fermentation by the end of August.  I have been researching Qvevri and other vessels, but actual detailed information has been hard to find.  I have a terracotta clay I thinks should work, and an electric kiln I believe I can fit the pots into.  I plan to fire at a cone 06, the walls will be about 1.25" thick.  I plan to build them using coils.  My main concern is, if I manage to build appropriate vessels, how can