Thanks for this, it is mostly the same as COH1 but it's nice to see the little differences, very well explained !
Just a note, because I didn't get it in the first place, the advice of playable - 64 to make the core is both sides included, this is why you drag your line at 1st level of grid 32 and not 2nd, for some reason I was a bit confused until I thought about it.
Another note would be to make sure people don't include or look for "test build" in their path to save the map.
Last but not least, it would be nice to include a screenshot of how the map you created actually looks in the game at the end, not only to hype it up a bit, but also to give people an additional way to check if they did it right.