Hi Hesh!
I'd run the Chaco Nev's Sis over NHM every time.
That line is amazing.
Chaco's Nev male brings the sweet haze incense and Haze A effects in a fast package with big resin coated calyxes. High potency. The plants have great structure, vigor, and resistance to typical garden problems.
Be interesting to see which you preferred compared to the Grail.
Looks like Shanti's Nev selection in the grail is very sativa.
Seems logical if you are trying to lock down one or both of the haze traits, but why take the simplest haze cross and select against the traits you tried to add in the first outcross (faster flowering, denser flowers, higher resin production).
Then, hybridize it with a different (less desirable?) plant with the intention of adding faster flowering, denser flowers, and higher resin production?
Seems to me like the keeper in a great Nev's selection does not reject all NL5 traits, but keeps the best from all 3 parents.
I think that's what Chaco did.
BTW: Chem's Sister > any Widow ever IMO ;-)
My single GHS Neville's Haze female was much broader leaf phenotype than what I was expecting but I am ultra pleased with her very positive and balanced and sometimes unexpectedly high high. Full of fun but always sincere surprises. A gentle teacher.