Jim, great screenshot!
Mind if I make a suggestion, though? The icon grid in the Shelf... when I added that option many years ago I never intended for it to be 'flat' (i.e.; all sides of each square in the grid having the same color), but something a lot more subtle, more 3D.
Like that line in the middle going from the left of the 'Main' tab to the edge of the Shelf: dark with a bit of lighter yellow to make it look like it's inset.
For instance, in DarkTech:
See what I mean?
Want to give it a try to see if the grid looks better that way? The colors used for the Shelf icon grid are defined by ActiveFrameColor1 and ActiveFrameColor2 in the .WSW file, you can play around with those to see if you come up with something you like more.
Hope you don't get upset by my suggestion.