On Apr 24, 4:25*am, Dave Nadler wrote:

The area where the bolts goes through has a solid material between
the inner and outer laminates; other than that its just the expanding
core material they use (no compressive strength). Spindelberger
told me it does not help to add a backing plate because of this...

Hope that is clear,
Best Regards, Dave

Dave,

My trailer has not such reinforcing inserts. In fact I proposed
introducing such inserts as the permanent fix. Only the handles
themselves have hard inserts.

If there were inserts the outer shell would not have collapsed toward
the inner shell causing the bolt tension to be eliminated. I have
photos of the severe deformation of the outer shell under the handles
of my trailer.

In my opinion the insert fix would be far superior to the backing
plate solution but it fell on stony ground.

Andy