Kathleen, Roger,
Thank you so much for your kind words!
Fact is, there's no specific recipe behind anything I do with pictures....
The Channels are the first thing I check... even more so If the picture I'm working on has a colour problem. If I think that using Apply Image can help eliminate or at least minimize the problem, then I try it ....
What I Know about 'Apply Image', I learnt from Katrin Eismann's book (and she doesn't dig very deeply into this particular topic...), from tips or Tutorials I got from the Internet and, as Kathleen says,"I
just learnt it hit and miss ". In other words my knowledge of it is quite basic ....
I'm still experimenting with it and to tell the truth, I still haven't got the hang of 'masking the channels' or 'inverting' while in Apply Image ....
Roger, I'm no scientist either ... and on top of it I don't have a clue about Photography ...

... so, for me, good photographers are among the geniuses who can artistically freeze moments or images in time which give or bring back very strong emotions ....