What? Why are you guys putting the noise gate before the tubescreamer? That doesn't make sense to me at all.
The tubescreamer boosts and shapes your guitar signal... So, you're essentially using this signal as if it was the actual sound of your guitar. A noise suppression pedal like the ISP Decimator should go after the tubescreamer & before the amp's input. You are gating the noise being amplified by your boost pedal before the signal hits the input of the amp, killing feedback...
+1...i agree, i use my ISP Decimator after my ts7....... going to try it the other way too