I recently saw the sewer tiles on your upcoming Kickstarter and had a great idea that I’d like to see for the riser tile. A tweak to the column tile with the ladder that leads to the sewer can be made into a riser tile. If it was cut off below the manhole/grate tile level, it would allow your previously made manhole cobble tile to be snapped on top. If a removable grate is added, it could be interchanged with a barred grate allowing for light to come from below, integrating with your proposed LED system. This won’t benefit regular gloomhaven, but I’m sure it will help those on hex grid D&D campaigns.