Hi Ben
You have the specularty a bit to high, I looked for one of the models I have done with sss skin but are on my old rig. I found most of the setting were to high try working one the layers one at a time. The top layer should be a bleached skin look (think some one with all there blood gone). The next layer should be a darkish red with blue vain (UVs). Then the back scatter layer a red not so dark again with vains think were you should see this with a light behind (ears fingers some times the nose)..........dave