Oh, one more thing: If you don't want to add a base, you could just buy some antistatic foam and cut it to fit between the PCB and the feet you already have on there. Turn the feet inward to keep the antistatic foam from falling off (the one I got came as a flexible but sturdy sheet, works very well for this purpose). As a nice side effect you don't need to worry about any static building up ^^ I also spray painted the PCB feet black so they don't stand out too much.
You know what: I suck at explaining this, here's some quick pics. Hope you get what I mean:
[click to enlarge]
If you take your time cutting the foam, IMHO it can look rather nice and it's also very cheap
With your 2F you will have to cut some more holes in the middle for the extra feet under the slots, but that shouldn't be too much of a problem if you take measurements.
