Anyone here have Minecraft?

You could make an Adminium wall around what you deem "explorable", in MCEdit or something, then delete the chunks outside of the wall. Otherwise I will just walk until I find an island I like.

I would also like to point out two things about this machine.

1. The machine has room for more TNT. A lot more. I am almost certain it could go to the height cap and still function properly, although the redstone would be more complicated with a lot more delays.
   
2. MCEdit would let you make a "skematic" of this machine, and you could literally place it in your server anywhere you want, any amount of times you want. Building it might be half the fun though, so meh.