[loocsinus]

It is smart that you designed the retainers based on maximum tolerance of tooth movement quoting from a textbook. I suggest you take X ray to make sure no root resorption have occurred. Also for those who want to imitate, measure the length of teeth and compare with the arch length to make sure the teeth can actually "fit" into the arch. I am a dental student.

[an_ko]

By "length of teeth", do you mean their width measured along the arch of teeth, or vertically?

[loocsinus]

In this case: the width. aka the "mesial-distal" length.