RE: High amp 5955 servos
Do you mean normally closed? Closed means a circuit is powered. On the Fromeco units, when the switch is open, the circuit in the chip is closed.
I still use the Fromeco regs with the switch built it. It's built into all the regs no matter what (normally closed, incorperated in the Motorola regulator chip), you are just paying the extra $7 for the lead and the pin. They drain a little current when off... not a big deal with the 5600 packs on my 40%. I just unplug the smaller 2600 bats on my 35% when not in use.
Using the built in switch is the simplest, safest, cheapest, lightest, and most failsafe way to go. Order the reg with 3 output leads and your power goes DIRECTLY from reg to RX without passing through any other switches or weighty, unreliable, or otherwise cluttering gadgets.
Cheers