set user role when creating new site ( from the admin)

I (super admin) am creating new sites (wordpress multisite) from the wp-admin. I was wondering if there is a plugin that will help me set the default role for the user of the new site that i am creating from the same screen/process?. I know hoe to change the role once i have created the site. But find myself forgetting to change the new user role from administrator to Author as this is done in another area of wpAdmin.