Alvastitcher, looking amazing!!
Mom-6, yours is gonna be grand too.
Here's mine with the extra half-blocks sewn.
[ATTACH=CONFIG]568313[/ATTACH]
I took the original top row of blocks and removed the topmost section, to create the top half-blocks. The section I removed I re-used to make the half-blocks for the bottom edge. Then I extended the sides, before deciding how to finish the corners off.
I do prefer the symmetry of the complete Irish chain pattern.
As it is, it will measure 52" square when stitched together. Not sure what to do about any borders as yet. I've enough of the orange to do a very narrow border, and plenty of both the other fabrics.
I've really enjoyed this pattern, and love the way the grey-shaded tops look, so may well repeat the train-ride in that colourway.
K