Hello!
As the LightWell and the Calice are liquid tanks, I think they should have a Comparator support to get the %age of filling.
If I'm right, it's just adding
@Override public int getComparatorLevel() { return (int)Math.Ceil(getPercFilled()*15/100); }
to TileWell and TileChalice, but I haven't tried to compile.