I think modern engines need only about 500-1000 miles to break-in. During the first 500 miles I kept engine speed less than 2/3 redline, if redline is 6k then I only accelerate to 4k, Honda S2000 has 8k redline so I tried to take it easy, only rev to 5000-5500 RPM the first 500 miles, after that it saw 8000-8200 RPM every day. So far none of my engines has any problem.
I never changed the factory filled early, the 2000 E430 actually had first oil change passed the recommended interval by about 400-500 miles, the oil monitor went from 10k miles to negative 400-500 miles.
Since your engine passed the 500-1000 miles already you can rev to redline if you like.