Here are some of my concepts. I've gone for something that's fairly clean and simple, yet striking. Creating an icon that works well within the logo or as a stand alone element, one that can be used for things like favicons or watermarks.
The logos are 100% vector so will scale well to any size, and works well in full colour, B&W and on coloured backgrounds if needed,
It would be my pleasure to work up any variations so please do say. I look forward to your comments or thoughts.
PS: I also wanted to mention that with #119, the icon is a combination of a "C" (top coloured elements) and a "5" (the entire icon). The "C" is also made up of 5 symmetrical triangles, again tying it back into the name.
Sadly someone pointed out that there is already an existing logo similar to my entry #119, so to avoid any copyright issues, I've had to remove it. My apologies.