I just took a quick look at this - will write more later, but I have to get an assignment written for my students.

On a glance, this looks totally reasonable to me. Pleat size is going to be on the order of an inch (which is reasonable) - I totally misunderstood your original post because I thought you had said that the pleat size was going to be about 2" (which didn't seem reasonable to me).

More later on the deep pleat! Gotta run ATM.