I haven't done much since the weekend, but I did play with gimp a little.
(original is here)
The greyscale is a cheap trick to cope with it just not having very interesting colors. I reversed the blue channel before losing the colors to try to reduce the relative darkness of the twig.
The rest of Saturday's roll contains less in the way of focus problems (I'm still sorting through them) but I am starting to really want the ability to control depth of field.
Nice...
Here's where the reds actually are, if I do an HSV decomposition, and use curves to pick out the reds on the hue part.
If I try picking out particular colors, I find that many of the browns on the buds and tassle are shared with the edges of the leaves, and can't be safely brightened. The trick is that I need to say "more red than anything else" rather than "near this brown" to be sufficiently selective.
I was playing with overlaying the red part of the hue decomposition on top of the unmodified image, but the result is a little mangy looking, and gimp crashed as I tried to save it.
I'd punted the stuff on the right when I cropped it because I didn't like how the bottom of the tassle was out of focus; if I'm not allowing myself to spot-edit, I should have been more careful about setting up the shot.
It does work well on the tassle, but the twig buds look scary to me.