Pressure pot idea. So I homebrew and keg all my beer, the maximum pressure I apply is normally 40, and only for about 24 hours to speed carbonate before dropping to 13-16 psi. Supposedly the Cornelius kegs I use can handle up to 100-135 PSI so they seem to be pretty tolerant. From my limited understanding artisan caps require considerably less pressure than this. So at $35-50 for a refurbished pin lock or ball lock keg they could work as inexpensive and relatively safe pressure pots. I don't cast or anything, but I imagine adapting an air compressor to pressurize one of these kegs also wouldn't be too expensive. My only concerns would be size of the opening, and I imagine making sure no one used the keg for any beverages in the future.
Thoughts?