I have a small usefull suggestion for a new wall. The current G-wall blocks gravity within the box you make, my suggestion is that there should be another "G-wall", but this one should block gravity outside the box, in effect, contradicting the current G-wall.
Uses: The uses for this new wall include; using newtonian gravity within a save whilst being able to filter it from particals elswhere, more precise photonic guase cannons and another way to reflect photons.
I think this would be a very usefull wall for future creations that use Newtonian gravity.