So, this morning I began hacking up gaps as a LayoutModifier in contrib. I didn't get too far before I realized that in order to retain the same behavior as the current built-in gaps (*per screen* gap configuration), a layout needs to be able to know on which *screen* it is called! This is the point at which I had a profound sense of deja vu, since of course we had the same issue with PerWorkspace, only with *screen* replaced by *workspace*. gah! I think, however, this could be useful information for other potential layouts as well -- I don't have any particular examples in mind, but having layouts that can behave differently depending on which screen they're on sounds like it could be useful for more than just per-screen gaps. So, I propose to add an extra screen parameter to runLayout and friends (which of course requires a bunch of trivial updates in contrib, unfortunately). I'm happy to do all the work, but I wanted to throw this idea out there first and see what people think, whether anyone has any better ideas, and so on. -Brent