Carol in WI, that's another beautiful finish! It looks to me as though it's complete as it is, but I do have trouble picturing how things would look that aren't there, so I can't picture how another border would look. It would be easy to mock up, though, and see what you think of an additional border v. as is.
All of my pieces are now up on my wall (excepting the third row of vertical sashing segments, which are at my sewing machine). I have this up as a 5 x 4 so I don't have to bend, but my intention is a 4 x 5 (I think I'll be able to lay it out that way when the blocks are sewn together and condensed). This is not necessarily the order of the blocks, but it's too much trouble to move things around when they're in pieces like this.
I see that I could have been less timid about the sashing, and put the prints that are currently next to the sashing unit, next to the cornerstone, and something with a little more presence next to the sashing unit. For that matter, I still could; it would not be all that much stitching to remove.