Ed,

I've used plywood for wing hold down blocks many times without a failure. Have you had a problem with them in the past which brought you to the threaded inserts? I'm still running a little behind you with my Deception build, so I haven't tackled the wing hold downs yet. The epoxy "slurry", do you just shred some FG strands through it or is it something more complicated? Do you thin the epoxy at all?

Did you put any doublers inside the fuselage? If so, please describe.

Greg