Steve ~ I vote for 0%, especially on the company you started post-S, but I understand your desire to chew things over. I'm guessing for the company you sold you can factor in the cost of litigating/mediating vs. just closing the issue.
One question I've never asked you: Do you think your WAW is cordial and friendly just because of her good nature, or do you think she may be aware of your NGS and use that to her advantage? My STBXW often tries to use my desire to "keep the peace" as a subtle form of leverage as we work out our split-up.
What your L said at the end is 100% true. It's not a pick-me-up. It's a fact. I hope you believe it.
