Denti
Tried and proven on light aircraft and certain structure on large aircraft, you can hardly relate this to a large fuscelage. You can make an RC aircraft out of foam and plastic, would it stand up full scale? I know, a bit draumatic but there is NO precedent for the 787 and using standard processes on what we know about this material may fail our expectations as we experience failures in design and manufacturing standards.
The in service test bed is a risky one.