As was to be expected, I spent some time doing more spiral grids and filling them with different patterns. This works for Well, but I don't have any finished tiles to show here. But I have tried Facets in two different versions which I quite like. The first trial results are a bit rough, but I wanted to spread the spiral grid love, so here are two photos:
The grid logic is a bit different, because what are normally squares stacked in two dimensions are now bent quadrangles warped and swirled around a midpoint. The zig zag lines one normally draws for Facets thus are all horizontal with respect to the quadrangles or all vertical.
And now I have to go back to keeping myself from drawing more spiral grid tangles.