Is there a possibility we fund Slock solely from extraBalance ?
I do not see a reason for that.Also by the contract code it is not possible. The extra balance can only be transferred to the main account.
Let's assume extraBalance has 20M at end of crowdsale. If that's the amount slock.it seeks and it is accepted 20M will be paid out from the main balance. After that happens, someone can make a proposal to send the extraBalance to the main balance.
The DAO