Will,

what do you recommend for breaking in a Hanno special (MKI)?
It will be installed into an Aurora 60, plane is almost ready for covering now. I do have the original rear exhaust offset MK header which is 170mm long, and the red OS pipe. I would like to use a 12x10 prop, will it rev more than 11.000rpm? Keep the header length as it is? I understand to start with the stock header length as the manual tells, but would like to hear your comment. Thank you.

And, yes, same prop for breaking in as inteded for flight later? This will be an almost philosophical question, I guess...

Dominik