I prepped all the chapters in LibreOffice today so that they’ll be ready to lay out.
Just to give you an idea of what that entails:
Copy the original LibreOffice file
Make text flush left/ragged right
Make text 18-pt san serif (I’m using Tahoma this time around, because I like it)
In paragraph formatting, set all the indents & whatnot to 0”
Except for space between paragraphs, which is 0.3”
Set spacing to proportional 125%
That gets me near-enough to APH for my satisfaction, while still having the text blocks line up once it goes into layout.