OK, my community theatre has a LMI/ETC 1.2k 24 circuit dimmer rack. I was always told when powering up and shutting down the rack to turn off or on the individual circuit breakers on each dimmer card and then the main breaker. Well someone told me that by using the individual circuit breakers as 'on - off' switches I am weakening the breakers and it is better to leave them on and just turn off the main. What is the general consensus? Will using the main breaker as a power on - off switch cause a 'spike' and damage the rack? Thanks in advance for your advice. PS: We are hoping to upgrade to a 48 circuit ETC Sensor rack in the near future. I can't wait!