BTW, everything I’ve described in my previous post, “When the Channels are Aligned”, is the basis for neigung part # 16: “Integrating and connecting each of the previous 15 components into one, unified energy.”
You have to get past neigung part 11, spinal neigung, which is the main subject of Core IV, Bend the Bow and Shoot the Arrow. Without a deep understanding of part 11, you can’t open the side channels adequately. Without the side channels, you can’t fully open the central channel. Without the central channel, you can’t fully open the lower tan tien and develop its capacities. Without the lower tan tien, you can’t fully open the upper and middle tan tiens. Without the three tan tiens, you can’t align them and begin integrating and connecting all of them into one, unified energy.