I just got my Blue Grille Vox Valvetronix 120 watt stereo head, The first-gen one with the trapizoid shape and blue grille with gold piping. (I gave it to my brother a fistfull of years back and he just moved onto to something else after years of sheer enjoyment). It's kind of like getting a new toy without the "new toy bill". I have the foot controller for it with the built in expression pedal too. But I'd like to use my either my RP-1000, HD-500 or Zoom G3 in the loop. The loop has both Left and Right inputs and Left and Right outputs. That's why I ask if those modellers will do stereo with a Ring tip sleeve combiner into the input jack. I must say the RP-1000 has a sweet chorus and I'd sure like to use it.