Yes hook Ezb directly to 12 volt

Use the external power not the EZB

Hook 12v to a Regulator and drop it to 7.2 volts . use that 12 volts from the regulator to power the servo

The batteries are probably sealed lead acid , and if they are like mine they are Gel filled but that just means they resist vibration.

OK, now I have it. I am a little dense. But, finally, I understand. I have that servo pc with the 8 servos on it. That will work well.

Thanks!

Great! , what I would do is take notes as you go so that when it comes time for you to wire things up you are confident and have something to quickly reference as you go. Just a spiral notebook and even make your own drawings. Every scientist has to take notes. Like they say at my job here in the wireless industry " if you can not reference your documentation to confirm your answer you are just making an educated guess and guessing is not for sure"

good Idea!

:D