Schuyler

As you know, I have been experimenting with UV sensitive glue for a few
weeks now and it has been fantastic in most applications. While I haven't
tried it for running boards, it seems that it would be ideal. It is clear
and viscous, so unlike ACC it won't be sucked up into all the little spaces.
You could put a small amount on the supports and the position the running
board. It will stay tacky forever until you shine the UV light on it. Then
it "freezes" in 3 second and forms an incredibly strong bond.

Andy Miller