User blog comment:Terrari492/Obsidian Generator/@comment-202.139.5.178-20120527051659/@comment-64.121.46.13-20120529020435

Why can't you? You need some stone, some sand, and a bucket of lava and a bucket of water. Then you just have to make it however big you want. If you're having trouble getting lava, you can just get started building your hellevator by tunneling down to lava. At the top are the manual duplicators, they don't require pumps or timers.