I just picked up my first half stack and got a nice array of pedals to compliment it. My bare-bones setup is an LTD MH400 played through a 5150 hooked up to an Ampeg slanted 4x12 with a boss NS-2 to keep everything contained. Unfortunately I've got a bit of a feedback issue with this setup. Unless the NS-2's threshold is maxed, I get crazy feedback, especially in between my chugging riffs. As a matter of fact, even with the threshold on max, I get a few squeaks coming through on my breakdowns. The other guitarist in my band runs an identical setup with a straight cab and his NS-2's threshold is dialed down quite a bit and he has no feedback issues at all. I've tried different cables and even a different slant cab, but I keep getting this same issue. My sustain is being destroyed and I'm still getting feedback! This can't happen live! Someone help!