Yeah, this is working well now.
A few things I would like to add:
Zone protection is available (which allows only one person to place/delete blocks inside a given cuboid) , but only for meaningful structures like a person's base, or a highly complex pixel art. Protection will expire if the owner does not venture inside the zone fo one week. Ask me if you wish to have it.
some useful building commands include:
/place <blockname> (Places <blockname> under your feet)
/cuboid <blockname> <solid/hollow/wire/random> (Fills a cuboid with <blockname>
/spheroid (see above)
/undo <1-120> (undoes your actions for the last <1-120> seconds)
/redo (guess)
/replace <block> <block2> (replaces all <block> with <block2> inside a given cuboid)
/abort (cancels any pending action)
/bind <block> <block2> (whenever you place a <block>, system replaces it with <block2>)
/tree <fern/cactus> (grows a tree wherever you place your next block. <fern/cactus> is optional)
If a command asks you to "modify two blocks to determine the edges", simply place or delete two blocks that will be at the two opposite corners of the cuboid. A block you place will be instantly deleted once the system registers it, and a block you delete will be instantly replaced.
To avoid accidental flooding, the physics are switched off. If you need water/lava to spread, ask me and I will enable them for a while. Remember, fluids with the prefix active_ will spread, fluids without will not (like the ones I used to make the epic pillars on my tower) I will not enable physics if there is active_water or active_lava in the level already, instead I will replace all active liquids with their still counterparts first before enabling them. Take care placing fluids above sea level.
If you see the message PHYSICS SHUTDOWN IN <world> please /goto that world, and help me clear up whatever caused this. I will instruct you how upon arrival.
I think that's about it. Happy mining!