Seed bombs aren't consumables, they're reproducibles. I could harvest a thousand of them in the time it took you to make a kilo of gunpowder, from local (mountainside) resources ..

>Also pretty sure several parts of the mechanism would need to be considered consumable if operating over a long period.

Well, that remains to be seen after the optimization steps complete. Fine with me if it takes a year before I have to replace a string.

Meanwhile, I'm guessing you are suggesting the "ma' gunpowder" deliveries happen via drone, or helicopter, or methane-powered rocket ship or some such nonsense, lol ..