On another note. I was testing out a reactor cell build in creative singleplayer. After messing around for a bit I discovered that the thermometer wasn't working. The reactor cell was going up to the maximum limit before it blew up, bypassing the temperature I set on the thermometer without activating the redstone signal. So that's one thing. Another strange thing was, i tested it out again except I stacked a couple of reactor cells on each other. As usual the thermometer wasn't working. But what's more, the reactor cell was stopping about 1 degrees just before the limit. So it was stopping around 999 ( I think, can't remember the limit) and wasn't blowing up. That's not exactly a bad thing, but I'd rather not take that chance in my SMP world and have it blowing up my base.