Hey all, I'm a noob to the interior guts of these tube amps, but I'm changing my 2014 100 watt archon's preamp tubes later today. After researching as much as I can, it sounds like power tubes are too dangerous for me to do alone, so I'm sticking to just the preamps. I'll have a tech do the power section, especiallly with the potential need to rebias the amp. I wanted to ask, are there any special precautions I should take when changing the preamp tubes/removing the metal covers? I'll use gloves to keep my fingers off the tubes, I'll unplug the amp and put it on the "on" position for 60 seconds to drain power, I'll use electrical contact cleaner etc.. Is it safe to remove the amp from it's outer casing? I don't know how else I could reach the tubes. I don't particularly want to die. Thanks in advance!