Greetings my fellow Line 6ers. I currently own the Pod HD Pro, and am pleased with the overall sounds that I've been able to come up with. However, I'm strongly considering selling my HD Pro in order to get a HD500X and Scarlett interface. Anyways, I was thinking about buying an external boost pedal, like a Maxon OD808-type pedal and use it in place of the modeled "Skreamer" in the HD. I play mostly progressive medal, so I'd be using it for signal boosting/tone shaping. My big question is how well does the Pod HD series handle external boost pedals? And would there be any difference between the HD Pro and the HD500X in terms of how they respond to the pedal? I've heard very mixed things about this, and would appreciate whatever insight I can get on the matter. Some people say that the Pod HD's input is already calibrated to handle a Guitar's natural signal, and that running an OD pedal will cause nothing but problems. Then I've heard from other people that the Pod handles pedals well, even Tubescreamer-like pedals. Thoughts!!??