Single TNT duper cobblestone farm

A fairly compact cobblestone farm. Cobblestone generators push their stone into a blast chamber, where TNT from a single duper breaks it into items. It suits anyone who needs cobblestone in bulk, to smelt into stone, craft with or sell on a server, and the top comment reports hardly any lag. The video runs two minutes and builders ask for a tutorial, so expect to copy the build from the world download. It runs on a TNT duper, so it does not work on servers that patch TNT duping.

• Place the TNT in the duper first, then set the detector rail and minecart on a temporary block next to their spot and push them in with a piston, or the block update lights the TNT. Four builders give this fix.
• Plan a large storage before you build, or switch the farm off when you have enough. The creator's own reply warns about storage.