OK - got the kit...........finally got it installed! Cathy took it for its maiden voyage.......and she loved it!!! She had a pretty serious mishap on her first scooter lesson, and was not sure about even getting on it again. Now with the kit installed, she doesn't want to get off. I sent pictures for the gallery.
So far, very pleased with the install. 
On the 400, it mounts to the frame and the centerstand, not like on the 650.