my 0.02$ :
you got a F and you got an s
And even then you make the f even bigger by adding the main "body" of the logo to the left. It isn't hard to read the F, but it takes some will to see the S, think about what you can do to make the S more readable, or abstact it more and put a logotype underneath or to the right (or do a xerox and put it left).
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glunge
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