indention spacing

[Eric Holbrook <eholbrook@austin.rr.com>]

I'm trying to find a way to increase the indentation between levels of
hierarchy in org-mode. In other words, i'd like to have indentation of
3 or 4 spaces instead of the standard 1 space. I'm color blind, and
the colors don't help my eyes pick out levels of hierarchy very
well. If i could do this, then i could do org-hide-leading-stars and
get rid of that line noise, too.

Where i see this:

* THERMAL
** Potential Bugs
*** Counting Difference, Rob v. Tahsin
    Rob will file bug on self.
*** Multiple Drivers
** Known Bugs
*** Bandwidth issue

I'd like to see something like this:

  THERMAL
      Potential Bugs
          Counting Difference, Rob v. Tahsin
          Rob will file bug on self.
          Multiple Drivers
      Known Bugs
          Bandwidth issue

thanks,
Eric