Need help with Xtra D-Rings

adding xtra d-rings
I was about to add four d-rings to my bed at the bolts on the floor when I started reading the instructions which came with them. The d-rings were purchased from a Toyota dealer. I have attached a copy of the instructions. Let me hear some feedback. I like placement of these d-rinds but would like to hear of it would compromise the structural rigidity of the bed where these will be attached. See attached thumbnail for product installation. I was thinking of one pair in the bed near the cab and another pair centered between those and the ones near tailgate.
Thanks
RC
Attached Thumbnails

 

With the backing plates they should hold most cargo.
I would not tie down motorcycles with them.
Put a couple in with the bed bolts for super strength for such things as motorcycles.

 

Id do (and am going to do) the D rings in the bed. look at "cheap mods"