Forming an A16 size crucible from clay and grog mix by hand.......I've used a vibration/ compaction tool that I've fashioned from a bit of old scrap metal attached to a compressed air hammer.
The recipe is in this video.    • Making clay and grog crucibles for me...   I hope that helps.
This is the first time I have made a crucible this size and it is a bit of an experiment. ...Only watch if you like watching paint dry!