Thanks for the pointer on Raw Therapy. A basic but capable programme. I took a couple of RAW shots of my (as usual opened) PC, and I was able to drag quite a bit more detail out of it.

I am going to convert to jpeg without any manipulation and see what difference there is working in X2 with jpeg

I actually converted the charcoal in X2 back to Classic, though. Black writing on a grey background just does not do it for me.

Nick