Right outta the box I run TT PRO .46 engines at 16.5K with a 9x6 prop for 2 minutes. Then it is an 11x5 prop for three 8 oz tankfuls 2-3 clicks off of full lean at full throttle. It is almost broke-in and ready for a plane then. After about 10-15 flights I do the final adjustments on the idle and top end then I RARELY have to touch the settings again. That is a "Textbook ABC/N George Aldrich" break-in. Those engines just keep getting better until you have MANY gallons of fuel through them. To do otherwise with an ABC/N engine is foolish IMO.

...to each his own...you bought it...treat it how you want to...it'll be your problem, not mine.