Thanks for the suggestion, Marty. Didn't have any of the 1970's era FW Mac Live in Boston. Found a 2014 release on Amazon with all 3 discs in one collection. Discs 1 & 2 can be had separately at a reasonable price. Disc 3 is going for like a hundred bucks. If you want vinyl, Elusive Disc is now carrying Vols 1-3 on 180 g vinyl (3 double LPs, I think). $30 a pop. After ordering I fired up the system and connected to YouTube to sample some of what I bought. Rattlesnake Shake off Vol 1 is up along with a number of other cuts. Thing that made the evening, however, is at the link below. It's from a compilation. Nothing to do with the Boston stuff. If you want to hear something electrifying and what The Mac was all about, "back in the day", check it out. Hope you enjoy. CRANK IT UP.
https://www.youtube.com/watch?v=bv0nEvy3Pok
https://www.youtube.com/watch?v=bv0nEvy3Pok