"Managing" the cofounder creates more work for everyone involved. As the OP is already trying to figure out a way to maximize work output by kicking the cofoun

"Managing" the cofounder creates more work for everyone involved. As the OP is already trying to figure out a way to maximize work output by kicking the cofounder out, you run the risk of creating double work. In a startup, this is highly risky. And, it's business.