[NTG-context] Influencing the vertical spacing of the table of contents? No possible?

I asked this on the list a while back. Is there no answer on this one? I use \startpacked\stoppacked with some effect, but I'd like to have more finegrained control. Original question: I'm using mkii. I've got a table of contents that just places one item on the next page, which is ugly. I'd like to tweak the spacing between lines, but which parameter do I have to adjust? It wasn't clear to me from the docs. Thanks, G