I'm constantly striving to be less uncomfortable in the saddle. I think I have my fit nailed down, except for my saddle setback.

Generally, if my saddle is level, and I let go of the bars while pedaling, I tend to slip forward on the saddle a tiny bit. When I move forward on the saddle towards the nose, and do the same test, I don't move at all. My setback is about 7cm, and I am slightly behind KOPS, for reference.

From this info, does it seem like I need to move my saddle forward a hair?