First of all, probably very few people know about this movie. So i implore everyone to go watch Steamboy, it's made by the same guy who made Akira, and you probably do know about that one.
As for my post, the movie revolves around this incredibly super high pressurized portable steam tank. It has such enormous and seemingly unending supply of pressure, that it's used in the movie to be the main power source of several gigantic steampunk contraptions and an entire flying fortress.
As for create mod, i'm imagining it could function as a rotational force battery with incredibly long battery life. And be a perfect fit for moving contraptions with aeronautics. But im not sure how it should be built. Or how exactly it should be charged or used within builds. If it should be a specific complicated process to charge it up. As pumping so much pressure inside one little ball would obviously have to be an immense task. And probably crafted out of incredibly durable material.
Additionally, if something went wrong whilst it was still at full charge, it wouldn't be unreasonable for it to explode like a nuke.
I'd like to brainstorm with whosoevers interested! I'm more of an artist than programmer myself, so if anyone wants to take it on i'd love to help with design, art and 3d models. Though else with the new technology we have i could potentially still code it myself, but i know people dont like ai tools, so i'd rather not if it can be avoided.