Anyone here use UPS to protect the crack? I have the crack+speedball upgrade and In my region we have frequent electric problems. I'm gonna use APC br550gi UPS to protect my PC and I wonder if it is safe to power the crack with the ups battery, or plug it only to the surge protection. this UPS is not using pure sine, I heard it can cause problems with the PSU of the computer (active pfc). is this relevant to the crack also? I have the latest crack version with the international transformer. Also what happens if the crack is not protected with a ups? does it damage the crack? and what about the tubes? Thanks.