simple, fast overworld end portal sand duping (54-72k/h) HD

farm that works with the end portal blocks found in the overworld. It produces 9,000 gravity blocks (sand, gravel, anvils, dragon eggs) per hour and portal block. works in 1.9/1.10. probably not on console/pe fix for 1.11: https://www.youtube.com/watch?v=umA6USREbNg enemysfriend22 helped creating this farm: https://www.youtube.com/channel/UCnwvbfHs8vHF0yehtV4DLbw world download: https://www.mediafire.com/?96xo67rreyxdclu videos mentioned: practical sand duper by panda4994: https://www.youtube.com/watch?v=fXh5y7Urjxw sand generator concept by Ground15 and ttmx: https://www.youtube.com/watch?v=oQtwI4wfB9s end portal frame removal by cool mann: https://www.youtube.com/watch?v=gpJIxpiBEpQ hopper chunk loader by SimplySarc: https://www.youtube.com/watch?v=egqsmXD_oCM materials: 3 sticky piston 20 normal pistons at least54 building blocks 18 rs dust 1 lever 19 repeater 1 iron bar 6 cobble walls 1 comparator 8 slime blocks 10 redstone blocks 2 boats eggs, podzol, red mushroom, bone meal, water bucket, materials for hopper loading and storage in the end.