In my opinion, your scatter radius values are all too high on the Physical Surface node.  Try the following:

ScatterRadiusR = 0.578

ScatterRadiusG = 0.195

ScatterRadiusB = 0.087

Change the SubsurfaceMethod to 'Walk Fixed', you won't see any scatter with the Burley selection. ScatterScale value should be 0.01 - 0.02.

Another observation, I notice you are using a Color Map for your bump channel.  That is incorrect.  You need to connect a greyscale image to that channel and it should be set to a Gamma setting of 1.  In your setup, the Color Map should connect through a Subtract Math Node and a Gamma node before connecting to the bump channel.