I love this mod for quick measuring.
However something that bothered me was the offset of the measuring item as you move it over the map. by default the sprite under your cursor will place itself somewhere in the upper corner of the tile its selecting.
the same with the crosshairs indicating the tile, they align to the corner.

So my suggestion would be:
-Could you add in an offset so it would go in the middle of the tile for both crosshairs and the sprite under your cursor(while snapping to the tile, like how machines would snap to a tile)
OR/AND
-highlight the tile it's hovering over(like a concrete tile under the cursor during placement)

Hope that's doable!

PS: i love the arrows indicating the location of the first marker.
PSS: this mod deserves a lot more downloads than it has!