Thank you all for the insight. It is true that a full sized engine is to be flown at a full rich mixture setting for break in. I normally observe during flight tests, that cylinder head temps often reach 325 to 425 degrees. After about 40 minutes to an hour the cyl temp and oil temp begin to stabilize which signals cylinder break in. I guess I will have to train my brain to think differently, and note that patience is the key to engine longevity.
-Tom