I think 31 is ma favourite one. It means something (group of people)...Glad you are part of this contest...I was starting to worry...other ideas? DO NOT HESITATE!
Impossible? not at all. In all honesty, I think you are one of the favourite. My client will take a decision, but you are seriously one of the few that submitted logos that meant something, and looked professional...I hope he'll choose one of your logo...I'd feel a lot better knowing he's going to look professional.
Sometimes, a client will choose a logo that was really not my favourite. It happens.
Most of the time, I am pretty good knowing which are the best. And you are one of them. Serious.