[Fireball]

... even smaller increments..singles.

Well, from a programming standpoint it's just as easy to make the speedbar do increments of 1 as it is to do 5 or 10 or whatever, but I'm not sure you'd like it when you tried to use it. When I was working on this I tried increments of 1 just to see what it looked like, and I didn't like it. The numbers were constantly whirring one way or the other, always changing, even in "level" flight. Maybe other people can keep their aircraft steadier than I can.

But...that's why the mod is here in the Beta section, to get feedback and suggestions.

Is it possible to do the same for speed?

The mod does change the speed increments from 10 to 5. (If I understand your question correctly.)