Good Plan.
you better find someone to drive for you then 
Clearly you're not holding any punches. Way to get personal!
I was just thinking that all manual lockers are a "weak point", but sometimes they are the best compromise for a street driven rig so I completely understand the choice.
Can you manually engage an e-locker without the motor? I'm thinking that it should be possible. It seems that air pressure is required for an ARB, but you can manually engage the cable type locker and I think there's a cable conversion for the e-locker, right? You can do a lot with a "spool" in the rear vs. an open differential like an ARB would give you.
