I tuned this grand piano by my style. And it was very fast tuning without controlling intervals - 30 minutes. I wrote it at YouTube. Bass is from C#2 6,3 cents down, and treble -1,9 cents from H4.
On SE I used this style and on iP11 used Pure octaves. The difference in the lower bass was up to 18 cents. My style was lower than your Pure 8.
And I want to put my bass a little lower because the last 6 tones are still too high. It's described in the video.
I said there in the video that I gave the treble 3.2 cents lower, but I remembered that wrong. The correct information is about 1.9 cents.
Is it possible to add stretch only to the bass part? For deeper bass. On the contrary, I need a negative stretch of treble. Then the tuning is very pleasant and does not sound very sharp and tight.
If I use your styles, they all have too high bass and high treble.
I see the biggest problem in high bass. Pure 8, 12, 15 and 19 are not clean, but too narrow. I hope I wrote it clearly.
If I have some time, I'll make another video where I'll show you this problem. But I've lost a lot of time with it.
And maybe it would be better to rename the discussion ... 😆