Professor,
Yoiu really do not need 500 miles before dyno session. I put ~100 miles on this engine and then spent a day on the dyno mapping it, partly because I "lost" the map when almost finished. It went to Maxton with 140 miles on it, and fresh oil...and it ran well.
Everybody has their breakin procedures. All I will say is I have been building bike engines professionally for many years now, and my procedures have proven safe and effective.
Would be nice to meet ya....
Dave