Product review (2 stars): Not necessarily needed for many Duet Sport dryers.
Bought this kit to reverse the door on a Duet Sport dryer, model WED8300SW1.  Didn't need a single part, but did use the white sticky tape to make it look nicer (you have to switch the brown plastic doohickey that covers the hinge screw holes on the opposite side, sometimes it won't lay flat after pulling it out of one side and sticking it in the other, so I covered it with the tape).

I did use the instructions included with this kit, which was for a different model (different number of and location of screws), but gave me the basic idea to get it done.