thx for that tip. i didnt try that, cause in earlier versions, you couldnt melt down compressed cobble.I dropped triple compressed cobble into the smeltery. It melts just as fast as cobble, but obviously contains way more. I made my smeltery pretty tall. Also, use a liquid transfer node with a couple of speed upgrades on a drain straight to your QDS. I run a server so I chunkloaded the area once it was full of triple compressed cobble. Ran relatively quick at that point.