*crosses mental fingers* Here's to not wasting another weekend.
Update: Looks like it's running good. I got a little confused when the main power connector actually had 24 pins, but I got the extra four to slide off the connector. Then I got confused when the extra four didn't match the four connectors on the other side of the board and didn't realize there was another connector for that one until after I had somehow managed to get it on. Now the real test will be when (if?) I add my old hard drive. .... Possibly not.