More coordinate systems

I work in the land surveying industry and we use State Plane Coordinate Systems frequently.  It'd be great is the app could display northings and eastings based on the grid of the SPCS.  Eventually we will be shifting to the North American Terrestrial Reference Frame (NATRF) (based off International TRF) and it would be great to get that as well.  There are TRFs for each tectonic plate.