Sorry to keep you hanging; I couldn’t load the forum yesterday.
I see you’ve found Q’s Inventory bible: Inventory CONSUMPTION: Inventory Items, Products, Recipes, and Order Tags . I still review it from time-to-time,
Here’s how I have my drafts setup:
This is the product. I sell just one size: 16oz pint. I could add other portions (20oz, 8oz, etc.) all of which would need their own recipie.
This is the inventory item. Just like the tutorial, the base unit is the unit I sell the guest. When I receive a half-barrel, the system puts 124 pints into inventory. For additional units I have configured three different types of kegs I can receive the beer with the corresponding pints per keg; half-barrel is selected (check mark) as that is the typical size I receive (more on which below).
And finally, the recipe for the beer. It reduces inventory by 1 pint.
Here is receiving a keg in the warehouse. The drop down for unit defaults to half-barrel. I could, of course, select another size.
Here is what the warehouse will show after receiving a half-barrel of amber ale. Of course, we really can’t know for sure how much is left in a keg. But for inventory purposes if I swap-out a keg and inventory shows I still have 50 pints, I’ll know something is up.
EDIT:
I forgot to add, for items I can’t delete I add zzz to the beginning of the name so they’re easily identifiable as not-in-use.