I applaud your willingness to try this, roberjerman! I hope that it will be a fun and eye/ear opening experience! If I had not such a long history of trying various methods and configurations I likely would not have had the courage to try it. I have had so many unexpectedly good results from alternative setups that I couldn't discount the possibility of something good coming from it. I will be curious as to your experience, which I'm sure you would be happy to share here. I have had very good results going from source to preamp.
rocknss, at this time I know of no minimal length necessary. If I were to speculate on the outcomes with sorter ICs, imo a shorter IC is always preferred in all situations (I know there are others who disagree; I'm not interested in opening up a debate on that). My guess is that a comparable benefit of Schroeder Method would be realized by using shorter ICs as to longer ICs. If the IC is about 1 foot long, I would think that to be agreeable to the method. I will also be curious about your results.