Hi all, I have a T Rex Fuel tank, which is a 10 output (8 9v DC, one isolated 12v DC and one isolated 12v AC) Pedal power supply. The 8 9v outputs are not isolated and are essentially a glorified daisy chain. I currently have 7 9v pedals plugged into it, and today I was messing around with another 9v pedal, and the extra power cable I added accidentally touched the metal chassis of the pedal, and all pedals stopped working briefly, then resumed. They all seem to be working fine with no obvious problems, though I have noticed the power supply now has a light 'whine' to it that I hadn't noticed before (though it very much could have been there before hand). As stated, all pedals 'seem' fine at the low volume I tried them at, is there likely any actual damage done? Thanks guys!