To touch on this a little more the air navigating this turn on the way to the short turn is the air that ends up shooting into the center of the cylinder. This is where and why short turn shaping is so important. On the common wall side the air is shooting along the cylinder wall so again it needs shaped with this in mind. Looking at ported Head pictures is a big “show n tell” knowledge builder. I have been self taught so I gained a lot on Yellowbullet tech. there is a post showing different heads and port work. Photo bucket screwed up a lot of the pictures but there is a way around that.