Hello all. I've acquired an early 60's Buescher 400 bari and I'm wondering what the best mpc would be to use with this horn. I play tenor and use a Van Doren with an opening of .110. I bought a Yamaha 5C to use with the bari but I'm not wild about it and need a more open pce. Anyone know if these older horns are chamber size "sensitive"? I play rock and blues and would like a more open sound than what I'm getting with this mpce.