Here's one of the little server mods I worked on over thanksgiving: flowGrab
flowGrab patches the server to also allow grabbing liquid flows (ie, non-source liquid blocks) with a bucket, and that includes buckets in dispensers. Non-source liquid in a bucket does not become a source when placed, it just flows away, but it does mean you don't need to sacrifice a source block to get a water bucket or a lava bucket.
This is no big deal with water, really. Water sources regenerate in Minecraft. Lava sources, however, do not regenerate. Use one up and it's gone.
I think you see where this is going.
It means you can grab as many lava buckets as you want out of a flowing lava stream, and use them to power furnaces.
It also means you can use a single lava source to power a machine like an autosmelter indefinitely.
WHOO SUSTAINABLE ENERGY! Your world's industrial base is no longer limited by however long it takes to completely mine out the Nether!
The patch applies to a clean decompile of MCP 9.40 updated to Minecraft 1.12.2 in the usual manner.
