I was hoping not to have to mention it - I didn't want to come across as Mr 'I like to criticise things on the internet' - but seeing as no-one else has brought it up, I feel compelled to. And hey, Skip, you did ask for CC
While the treble-clef/guitar concept is alright, the execution could be a lot better. The difference in line style/shape between the guitar neck and the clef is jarring. It looks like you've tweaked the curves of an existing clef, found a bit of guitar vector art and wedged the two together with little thought to making them sit better together.
And as for the clef itself... well, if I was your art director you'd be staying late, put it that way
Line thickness and curves need some major tweakage. It needs to be more elegant and consistent. I'm not saying make it a similar thickness all the way round, that wouldn't work. But it needs to look more like it was either brush- or nib-stroked, with the line getting predictably thicker/thinner in places depending upon the angle of the virtual 'pen'.
There are three areas of that clef which are crying out for better curves: the top [where it meets the neck], the bowl leading round to the pointy tail, and the bottom stub/curlicue.
If you worked on those curves, you'd see a real difference
Whether you ought to or not depends on your professional pride, as it sounds like you'll be working for a token sum at best. So I wouldn't blame you if you said "Nah, sod that!".
Also, because I like to criticise things on the internet: Station
ery, people.
E.
