Hi Murray.
Yes that works.
In the tutorial I blended in the Green channel as well (I discarded the Red)
If the picture were to stay in B&W it would not be required however when adding the colour back I find it is better to try to use more than one channel if possible.
This makes the colours truer and it can be quite important in some images when trying to decide what the original colour used to be.
However lightening the left side of the Blue channel instead of darkening the Right side (as I did) would probably be a better way to go and would then I would not have needed such high values when using the channel mixer.
As we know, there are many ways to achieve the same thing in Photoshop.
I tried to explain more general methods that should work with most images rather than the 'best' method for this particular image.
Thanks
And thanks Craig.
Ken.