I've got a morley abc-y switch on its way from ebay... My question is, is there any potential harm I could bring upon my amps when I plug them in. I dont think the morley has line isolators... in fact I'm sure it doesnt. My primary amp is a boogie F50... properly grounded. The next two amps that I want to but on my abc switch is a on silverface champ(ground lug has been ripped out of the original plug), and a old 50's airline... never had a ground, the cord is a two prong. Both the airline and the champ can give you a juicy little shock if you mess around just right.... Is there any damage that can occur when I plug all these together? I understand I could have ground hum... I can live with that... buy an isolator, whatever,,,, but when I plug these in, can I mess up my mesa with the voltage coming over my lines?