Overall the ID is good. We need further definition of how the idea is implemented. Are the Tabs listed on the Project Edit Left side Navbar? or are the Tabs listed on the same line as Project Details, Finance, Portfolio, Business Case. Or do you click on Custom Forms and then see these Tabs? or are the Tabs listed on the form with Tasks, Project Detail, Updates, Issues, More? Please consider user permissions. Some forms are Never to be viewed by a User. Also consider how the forms will be sequenced Left<>Right, Up<>Down.