Live Masada CD

I've been listening these last days to the JOHN ZORN MASADA LIVE: Masada CD (1995 - Jazz Door (Italy), JD 1293) which is with Kenny Wollesen on drums. Four questions: 1- Why Wollesen on drums? 2- Who is he? 3- Is it me or Greg Cohen is playing an electic bass on at least some tracks (and if yes, why?) 4- Why was this cd never released by zorn himself? Is it legitimate? Thanks __________________________________________________________ Lèche-vitrine ou lèche-écran ? magasinage.yahoo.ca