Interesting that this has spawned so much conversation. What a great thread. Obviously there are other forms of glue but, you were asking about TB-III. You found the fundamental data that properly used, PVA is stronger than the wood itself. After the adhesive qualities things become more subjective with woodworkers often favoring different glues for the same task for different reasons.
As to trying to save money on glue, I will use just a portion of a 16 oz bottle making something like a chest of drawers or a hutch. That is, I have no need to have a gallon of glue on hand at any given time. Your ease of access to the product you prefer or your environmental situation may effect that choice.
After having tossed excess glue in larger containers due to separation failure (the glue would not re-emulsify) I just started buying 16 or 32 oz bottles, whatever was handy or on sale at the time I was running low. I decant the glue into Glu-bots and/or a glue well depending on what I am doing and cannot remember the last time I had to throw glue out. Your consumption rate will alter your purchasing decisions but, I would start with 16 oz bottles and see how it goes.
Last edited by glenn bradley; 02-12-2019 at 9:48 AM.
"A hen is only an egg's way of making another egg".
– Samuel Butler