Well, my original plan did not work on the functional side.
What I did was end my disgust with having to remove the grab rail when I wanted to go solo. I rarely have anyone on bike (actually, only my 8 yr old daughter has been back there). My plan was to be able to have grab rail mounted to seat (off the bike). When you remove seat, grab rail (in same location is now part of bottom of seat.
However, it will now be for cosmetic/convenience purposes only as their is slight movement of rail until I brace the bottom of seat with some metal (probably under foam). The bike takes on a totally different appearance with grab rail "trailing the rear" .....................
Was a real simple removal/replacement of staples, drilling of plastic seat base for grab rail attachment, then add bolts and nuts. Bam. You are carrying the seat around by the grab rail for it storage, etc.