Hey guys! I've created my obsidian generator after a few hours of work. Here's how it works: I make about a block deep or so manually, at the top. Then I let the pumps on the top and bottom make more of it using a glitch. The pumps are each wired to a 1-second timer. The obsidian forms on the bottom, and I mine.

Obsidan generator

Here's my obsidian generator! The lava is still filling, i just couldn't wait to put this up.