Looks good 
… but … if you have time available, can you to change the WL to R=G=B = 15700 in camconst.json and rebuild the dcp for D810 ?.
For D800 because we don’t have WL data in camconst.json we rely on Dcraw single WL (16383) which is wrong … I think it’s better to build the dcp taking reference data not straight from NEF but from it’s conversion to DNG … (waiting for D800 samples to build the camconst.json item …)