So, either I do the button pushing by changing the values in the dialog every time, or I do it in the store when I buy the stuff myself. If I don't need any new grapeshot, for example, then I don't tell the quartermaster anything and I don't press the "Buy" button for grapeshot either. If Auto Buy just buys the minimum then I need to go to the store and buy more than that minimum, so I may as well just skip auto-buy, go to the store and buy what I want anyway. (Does Auto Buy sell what it thinks is surplus, or does it only buy things to bring them up to minimum levels and leave surpluses alone?) And then there's the matter of prize ships. I capture a nice fat Spanish galleon loaded with cargo, sell the lot at the store, that takes several hours and now it's night time. I go somewhere to spend the night, next day I find the quartermaster has restocked the ship's supplies and now I need to sell them all again before I sell the ship. Alternatively, if this option to tell him to switch off Auto Buy for various goods is implemented, then the first thing I do when I hire him is switch the whole lot off.