Arsh: you asked, "I have a couple of questions about the Zephyr:
1) how long does it take to break in ..."
Not long. Maybe 50+ hours.
"2) do you have any suggestions on setting the arm height on the scoutmaster with the Zephyr?"
Follow the instruction. I would set VTA so the arm is horizontal with the platter. Then adjust by ear. Set VTF within the recommended range. Harry Weisfeld does not believe in using anti-skating (AS). Peter does. Frankly, making adjustments to the JMW arm is a PITA. I use just a little AS and only to minimize uneven wear. Send the Zephyr to Peter for a check up after 1500 or so hours of use. Not only will Peter clean the cartridge, but he can check on wear patterns. That's how I settled on the AS adjustment for my arm.
Cheers,