I have read Julia Sweig's book and used it as a reference before, EJ. I highly recommend it if you haven’t seen it, as it covers a lot of the Frank País arena. Though I don't remember reading anything about Guevara murdering the non-ideological in the Sierra, nor does she detail any of the rumors you have discussed concerning País's death. Given that Julia E. Sweig is one of the leading historical authorities on the Cuban revolution anywhere, and has written and spoken about events in much detail many times, perhaps you could contact her with these revelations and perhaps, oversights.