Thanks again for your feedback.
Regarding your request on #97 to adding the plus sign in the "O", I'm afraid I can't do that for you, since it have been used by other designer.
I'm trying to contact him to asking if we can collaborate to make it happen. And I'm still waiting for his response.
So, as an alternative options, here are some concepts for your consideration (#104, #105, #106 & #107).
Best regards,
Ruri