Well, assume we remove both the revised solar forcing from the assumed primary greenhouse gas levels. We have an additional 0.81 watts of solar an an additional 0.33 watts of soot, for a total of 1.24 watts. We have to remove this from some other item that causes forcing. Few people disagree that total forcing by the IPCC estimates are wrong. This estimate is 1.6 watts, with CO2 at 1.66 watts, and 0.98 watts for the other three listed. This is a total of 2.64 watts. Removing 1.24 watts makes this 1.4 watts. This figure is only 53% of the original estimates. 53% of the CO2 would be 0.88 watts. Now I do disagree with this figure, but that is how this math example pans out.
Point is, no matter how you slice it, the IPCC numbers for greenhouse gasses are highly suspect.