1/4 inch camera mount without opening it up, or putting any scratches or glue marks

How do we add a 1/4 inch camera mount on to a very expensive strap carried LIDAR scanner 
Without opening it up, or altering the plastic or even putting any scratches or glue marks on the outside such that it can be returned or sold later. 

My Initial Wooden mount worked really well. Even allowing the scanner to fit back into it's foam case without modification. 

The only external points that are solid is the 2 metal tabs for the carrying strap, so I used those with a thin strip of double stick tape that in sheer mode with the tabs holding things from peeling up made it incredible secure. 

Original Wood mount vs Delrin. 

Camera mount in Delrin. 

Finished Camera mount in Delrin. 

Here is the  Finished Camera mount in Delrin. 

  Below are attempts to laser cut Delrin just a bit too thick.