TOC vertical spacing

[Bradley Navarro]

Hi all,

I have figured out how to change the spacing between sections in the TOC 
using the tocloft package. However, the package doesn't seem to have a 
way to change the vertical spacing to double space right after a chapter 
if there are sections listed beneath. For example, I want this:

1  INTRODUCTION.......................1
    [***change to double space***]
   1.1 whatever................................1
   1.2 whatever................................2
   1.3 whatever................................3
2  INSTRUMENTATION...............4

3  OVERVIEW................................5

You can change the spacing before each section, but if I do that then it 
will change not only the spacing right after a chapter, but also the 
spacing between each section. I just need to change the spacing right 
after a chapter if there are sections listed below. Does anyone know how 
to do this? I am all out of ideas at the moment.

Thanks,
Brad