Thank you for the feedback.
In fact you might have been right.
These kind of logos can represent almost any company that has CS, GS or any combination of C, G and S initials.
For example:
http://www.gslaw.com/http://en.wikipedia.org/wiki/File:Grasshopper-Club_Z%C3%BCrich.pnghttp://www.z-no.org/images/sc%20logo.jpgAnd the list can continue. In fact one of the designers in the contest had a private message to me asking to remove one of my entries using the CSG initials as he believed it is too close to one of his entries.
As you can see these initials and the way they play are not quite unique and it's actually a common aproach.
Based on my long time experience as a logo designer I strongly suggest to move in a different and more representative direction, avoiding the obvious.
My bests
Emi