I've done this at a 10 person startup. If you have 10 employees, you probably have a decent law firm. Any decent law firm will have boilerplate separation agreements that can be easily modified to fit your special needs with minimal work.
I was primarily thinking of the 60 days full pay and benefits for someone who had been there barely a year. That's like a week of the entire company's payroll.
I think the stock concerns are making a mountain out of a molehill. They may not even want it. The other legal stuff probably wouldn't be worth the legal costs/headaches of enforcing anyway.
