matrix03 - bear in mind that changing those PM parameters will change the visible specular reflections in your image. It should not change the new bump at all, since we are not using those PM parameters to control it. To be honest, I think you already have masses of 'shine' in your image. You could try increasing the spread, though.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)