The results of my conversion, Dina as an OTF, are posted here: https://www.tartley.com/dina-as-otf

Using somebody's TTF conversion of Dina from here works pretty well:
https://sites.google.com/site/rickard234/filecabinet

Problems are:
* It's a version of Dina from March 2010
* Although Dina shows up fine in my terminal, at all sizes, with italics and bold, for some reason the font is invisible in font-selection dialogs, so you have to click blindly on empty spaces to select it.

That makes me want to re-check my output from fontforge, above. Maybe that was blank in the font selection dialog but would have rendered ok in my terminal app? to be continued...

Tried fonttosfnt again with Dina v2.93, same results. Smallest size is available (and looks perfect.) Next size up is available, but looks too bold. No other sizes are available.

I tried just installing the output I get from converting DinaR.fon (instead of from all four files.) I expected this to give me the "regular" font in all sizes. Instead it gave me regular, italic, bold, and bold italic, all in size 6. This sounds like a clue that I don't understand what I'm doing.