[Elecraft] Routine Shutdown of KPA500: Use Front or Back Panel Switch?

[PGrig]

I'm sure this is a simple question, but I could not find the answer in the Manual.

If you're turning the amp off (e.g., at the end of an operating session), must you
turn off the switch on the back panel (assuming the fan has quit running) or is it OK simply
to use the front panel switch for such shutdowns, leaving the back panel switch
ON most of the time?  Does the unit, after the fan has stopped, draw any power 
when the back panel switch is ON and the front panel switch is OFF?

I'm assuming that the back panel switch is for use when wanting to kill power to
the chassis altogether, e.g., when servicing it.

Thanks!
   -Paul, N1HEL