So I'm getting the Kustom Defennder 5H head. It's gonna be my first tube amp. It's gonna be used with a V30-loaded no-name cab. I play metal and have previously used cheap clones of "metal"-pedals (Boss HM2- and MT2-clones amongst others) with my SS-amp's clean channel. Now I don't wanna max the volume on the amp because I live in a flat and am a bedroom player. So I was thinking I'd dime in some light crunch and get the distortion from the pedal. Now my question is: What about "level" or "boost"? I know that a Tubescreamer was primarily used to just boost the signal. Do I set the level knob to match the clean volume or do I lower the gain on the pedal and turn up the level knob to get distortion from the amp?