Basically, I'm building a 3-high room for my king, with a border around the edge of the upper levels like many nice hotels. I already have the first floor, which I've foolishly engraved already, including several walls within the room itself. Now that it's time to build the channels to knock out the floor above and open it up, it occurs to me that since channels technically try to dig out the "wall" space below it, I could possibly end up destroying some engravings below thanks to the weird "engravings can be destroyed by digging near them" rule.
And since more than 50% of my engravings are masterpieces (my engravers are probably 5xlegendary by now, since I detail everything) losing even one engraved wall is extremely dangerous.
[ February 08, 2008: Message edited by: mwoody450 ]