for me... using periodic table as a concept is amazing. even it's hard to make it look amazing :) I am almost give up because of them, too... but, if we can find it... i believe it will to be one of great logo ever made, just like National Geographic logo, who knows...
Here, thing that I want to reach is not your gold... but your first idea, one of amazing concept I have ever hear. So, I will stay with them. If you are not interested, just throw them suppose I can find another way to realize your amazing idea. I hope you not objected, anyway...
Best regards,
Herdian