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try and refine number 4. i like the simplicity of number 4, but you dont find the idea of a gear in that one. what i suggest:
try and make the margins of the cloud (number 3 we're talking about) look like gears-like number 4...but with the full colour of number 3. and please dont use full black for the text (i suggest using gray, or a blue-ish gray)
