Sorry for the insistence but how would you go to tune a piano on Rob Edward Grant's Precise tuning temperament?
Would you use a software?
Discussion
Yes, I would use a digital aid. The frequencies are close to those at equal temperament so I would probably start with that and then tweak it.
I think A432 is valuable and appropriate but is also surrounded by a lot of myth and bad info. I had my piano there for a few years and recently moved it to A435 to try that for a while. I have not found a favorite temperament yet though.