Create: Stuff 'N Additions - Tank Fix (Spout, Curios & Upgrade)

Tank Fix connects Stuff 'N Additions tanks to Create's Spout. Once the add-on is installed, the Spout can fill those tanks and fluid-moving blocks from Create work with them, which the base mods do not do on their own. The mod also turns tanks into reusable fuel: a tank placed in a furnace or boiler slot supplies lava and keeps its internal capacity, and a fuel slot ticks it down instead of consuming it instantly. Aircraft from Immersive Aircraft can take the same fuel in their boiler or fuel slot.

Tank Fix is published for NeoForge 1.21.1 only, with the file 1.3 for 1.21.1 as the latest release. It requires Create Stuff 'N Additions and runs on client and server, so the server and every player need it. The code is open source under the MIT License, and public links to the source code and issue tracker are available. Integrations with Tank Upgrade, Create SA Tanks and Curios are described by the author as working with the mod.