I agreed to be a mediator for some song writers. I have known both for over 30 years. When they collaborate they write some fairly decent stuff. They are both intelligent, one loves to disagree for the fun of it, and takes massive pleasure in being an obstinate @5^^&&*%$#. The typical disagreements revolve around how polished does the performance of a song have to be to have a finished song. Few disagreements crop up about what key, structure, general sound, end goal, etc. Background; guitarist A is semi-retired, massive amounts of time available, extensive musical education, and has had many gigs. Guitarist B is single, hasnt had or needed a job for over 25 years, massive amounts of time available, and doubles on Bass. His general theory on bass lines is every song can use more notes, more treble, and more slap. They have been friends for forty years. The concept is that I could help them grow musically, and mature as musical partners. Besides bailing on this deal, what advice does the experienced TBrs have? Are there any tried and true methodologies that may help me, or them?