So, because I'm somewhat obsessive about these sorts of things, I tried measuring my sit bones again using a different method. First method was sitting on two markers and measuring the distance between them. Second method was the tin foil on a yoga mat routine, which gave me a measurement of 150 mm (previous 130 mm). I'm not particularly convinced either are right, so perhaps I'm somewhere in between?

What I know is that when I currently sit on my bike, it feels like I'm sitting inside my sit bone. I don't really know how to explain it, but my soreness isn't at the tip of the sit bone where a typical yoga sit would be. Rather it is up and in a bit. I don't know if that's because I'm leaning forward or because the seat is too narrow (160 mm) and my sit bone is straddling a bit. Does that make sense?

This is why I keep waffling between a Flyer and a B67. I can't believe that a Flyer S (177 mm at best) is going to give me that much more realty than what I currently have. Are there disadvantages to having a seat that is "too wide" for the average sit bone?