I've taken the liberty to move the second Detroit, MI border crossing from where it sat in Windsor, ONT, to the approximate location of the Detroit-Windsor tunnel where it crosses the border under the Detroit River. I've also added a link to the tunnel's official website, which has practical and historic/technical information posted. I tried to put the locator icon under the river, but to no avail

I've never tried to change a .kmz file in this way before, so I'm not sure the results will automatically propogate to future downloaders. Any comments or help on sharing updated files appreciated!

Good cheer!