Many thanks for having taken the time to look into the project.
Your version is how I initially went about doing it, which is at the same time very flexible and powerful when wanting to deal with alpha values an a per layer basis, but error prone and time consuming in my case.
Imagine I want a certain color on layer 12 to be 50% transparent for the final image, NOT 50% above whatever is underneath. I would have to paint that alpha 50% grey, and all other 11 layer underneath, exactly on that pixel, black to have 100% transparency to have the effect I need for that pixel on layer 12 at 50%.
I guess what I was looking for was like painting on the A layer of the RGBA channels in Photoshop, which is the same single A layer, whether you have 1 or 100 graphic layers. A massive time savior for painting transparency, yet keeping all layers intact.
But no big deal, it’s fine the way it is, will get used to it.
Thanks again, great support.