Wasn't in the mood to open up the power supply.
I'm not a huge fan of
using the AT power supply to begin with; I had to chop off the ends to
stick 'em in .156" headers anyway (which I don't feel too badly about
because they're cheap generic PC supplies, not an actual vintage item).
I use them in all kind of projects, and have no problems.
I could use an ATX supply if I wanted to put a soft
switch in. At some
point, I'll have to make a board to wire up whatever supply I use to the
.156" pins anyway, so why not? They are, in fact, cheap. But I also like
the dedicated, fanless ones. Sometimes it's a matter of aesthetics.
It is up to you, but ATX power supplies are cheap :) You don't NEED to
put a soft switch. Short the green wire with a black wire, and key the AC
supply. It works :)