I looked real hard about running a copper bus bar and gave up, instead ran a #8 jumper wire from the breaker to the bus.
http://www.mykitlog.com/users/displa...g=65433&row=39
Also, you'll notice the breaker body is "loose" to the shaft of the breaker, unlike all the other breakers. When you mount it to the panel, the breaker body will rattle around. I was uncomfortable with what kind of fatigue that might result over time. I modified a nylon washer to act as a shim behind the panel so it would snug up to the panel.
http://www.mykitlog.com/users/displa...g=65431&row=40