Just a couple of question:

1) What is the difference between the powerbox, pwer expander and the isolators (optical & non optical)

2) Whats the best and least complex way of rigging a large scale project with lots of servos including a couple of the high power type.

Thanks

Power Exander, Turbo regulator w/ failsafe switch, two 7.2v 2200 to 5500 Mah Li-Poly batteries.

Bulletproof.

Thanks for the post. Is there any chance of RF noise from the fan on the regulator?

No chance of RF. It is a very low voltage low rpm fan.