Is there any way of succesfully connecting an external multi fx unit to the 150 Spider 2? I have a Boss Me20 unit, I have all my patches/sounds for different cover songs that my band does in this so would like to keep using it. Problem is it seems to conflict with my Spider 2 (which i've only just bought), at any sort of rehearsal volume it just feeds back dreadfully. Anybody have any ideas how i set this up?