I just recently purchased a SWR Interstellar Overdrive preamp/effect and am having a lot of trouble getting things set up the way I would like for them to be. Theoretically, I can use this unit as a preamp, and just use the poweramp section of my Redhead, or use it as a distortion effect and just use my combo amp as usual. Unfortunately, the manual isn't that helpful when it comes to setup, and I tried the guys at SWR without much success so far. I'm not that knowledgable about this stuff, so anyone who has an IOD or who has a rig comprised of component parts should be able to help...and I welcome your advice! I would like to know how to set things up either way, preamp or effect, so that I can try things out and see which works best for me. I have balanced and unbalanced jacks and an effects send & receive on the Redhead, and have an effects send, unbalanced and balanced on the IOD for those who are not familiar with this equipment. Thanks for the help an advice.