It was tuned by Chris Todd at TOTD but it think i have traced the source of the trouble. The breather pot that i put I'd plumbed it in wrong. In my infinite wisdom I'd put the large pipe back that I now think vents to atmosphere to the oil/crank sump return leaving oil to spew everywhere.

So its now looking like small return pipe to oil drain. Large pipe venting to my technical milk/catch tank. I'm hoping this is the cause of troubles.