One more thing. Why do I not use layers? I could and save as a PSD file so I can always go back to the file in Photoshop if needed.
The reason I don't is that all the adjustments have been done in Lightroom, so I have all the edit work up to the point of going into Photoshop.
That is my excuse and I'm sticking to it!
But to be fair I will have a go at using the technically correct layers process - probably be a good discipline to get into!