Please disregard the crookedness and the scrunched top & bottom of the picture - I couldn't back up enough to get a decently framed picture.
The black is just the king-sized sheet that I pinned the column to .. it's not the background of the hexagons.
The left side will get filled in with half-hexagons so I have a straight edge. Ditto with the top & bottom edges; they get a different half-hexagon shape for the fill-in.
The ragged right side will hook into the left edge of the next column. Kinda looks like castle crenelations, don't they? :-)
Seven more columns to go.