That's an inspired test rig. I hope my previously voiced doubts regarding the Park meter's accuracy haven't made you question it. If it's any consolation I usually assume that if your fingers feel slightly painful on the spoke key but you aren't rounding off the nipple, it's probably tight enough.
An attempt at levity, I am a light-hearted person. I like very much your approach to wheel building and will certainly bear it in mind next time I build one, although I am a very mediocre cyclist and my wheels require only a similar level of mediocrity. Like I said I am impressed with your approach and thoroughness but I have wanted to post this picture on lfgss for some time:
It is worth bearing in mind we are building bicycles not space shuttles; like I said, light-hearted.
An attempt at levity, I am a light-hearted person. I like very much your approach to wheel building and will certainly bear it in mind next time I build one, although I am a very mediocre cyclist and my wheels require only a similar level of mediocrity. Like I said I am impressed with your approach and thoroughness but I have wanted to post this picture on lfgss for some time:

It is worth bearing in mind we are building bicycles not space shuttles; like I said, light-hearted.