After explaining to someone on the GT list how easy it is to assemble a new computer from parts, I got hammered for hubris tonight.
We got back from Julie's softball game (where she acquitted herself well enough to get a game ball!) and I set out to start putting the machine together, the parts having arrived today. Piece of cake.
I have now installed the motherboard three times:
Once, because it's the first part you put in.
Again, because I had to take it back out to screw in the aftermarket heat sink that I'd bought.
A third time, because some of the standoffs that I'd screwed into the case had become stripped during the two previous installations.
On the other hand, I think it is now in the case to stay.