Gotcha. Something like this then? In general I'm finding these don't look as great scaled down. :/
I really like this one. the S is the ground of the logo so it should be at the front, but perhaps add either a little space between C and S, or push them together a tad more so it looks more like the S is slightly overlapping. A little more could be done with the negative space in the corners, perhaps add a little accent loop that looks like something is orbiting the CS? Just a thought, but that one is the strongest of your options. blue and yellow orange work together well, gives it a "spacey" color scheme. Maybe brighten the grey borders on the text a smidge, or play with the lighting on the text a little.
I would really like to see other ideas from others as well!