Hi all. I'm a decent beginner that just got my 500X, using either headphones or a tech 21, and I'm trying to figure out how to use all the volume controls to get the most gain at a lower volume level so i don't fry my ears/bother the wife, understanding that there might some tradeoff. I've been reading MeAmBoobo and experimenting but i haven't figured it out. What is the right combination of the POD master volume knob, the POD volume knob, the guitar volume knob, and the tech 21 volume knob (when i'm using the tech 21 instead of headphones), assuming (correctly?) those are the four inputs to play with? Thanks!