I breaked in my OS 12 TR similar to what you suggested and it lasted for 2 club racing seasons or 4+ gallon and i'm about to run it for the 3 season. It still have good compression and engine start with ease. your milage might be different.

On my first tank I let it idle 1/3 tank and then start to run with 25% throttle for 2 min and let it cool down. Gradulatlly leaning the needle on each cycle to maintance/reach 200F. On my 2nd tank i'll keep it 25% throttle run for another 1/2 tank then move on to 35% throttle. On my 5th or 6th tank i'm already "racing" with the engine but didn't go full throttle more than 2 second.