if you measured at 150, you MUST get a saddle 150 or LARGER otherwise, you are putting the weight on the delicate areas that your sit bones are built to protect.

Padding has the tendency to allow your bones to sink in so that there is now pressure on your soft tissues.
Push your thumb into a cushion and compare that to pushing your thumb into a table top- only the tip of your thumb is compressed on the table top but on the cushion there is pressure up the sides of your thumb too.
Keep hunting. that Cobb sounds AWFUL