looks like bloody hot glue. Rubbish!!
ESM should be ashamed of themselves. Hate to think wjhat inside the fuz and outer wing panels look like . . . .
cosmo that looks like a decent fix though id have made the spar double and sub spar all from one piece with grain running length ways.
perhaps carbon fibre mat along the spars and rigid CF tape along the top of the spar all in one piece.