Recently saw a thread where a couple guys mentioned putting a Zoom MS100bt into the FX loop of their HD500 (I can't for the life of me find that thread again). I use a couple EHX pedals (LPB-1 and SoulFood) and a modded DS-1 in mine for smooth overdrive, crunch and lead tones. I'm curious what others might be doing with theirs (other than 4 cable method). The Zoom pedal idea really got me thinking about maybe adding a couple other pedals into my loop and controlling them with a looper. Then THAT made me wonder what other creative uses people have found for their FX loop. So... What do you put in the FX loop? How do you use it? What's the benefit? Where do you put your loop block?