I have (had, just sold it) a large Viperjet from SM, I had a bad landing (entirely my own fault), and damaged the wood thats holding the main gear.
A very good friend of mine, which is also a very experienced builder did the "rebuild" of the wings. In order to do so, he opened up the wings, and found some "funny" things...
Not too easy to see on the pictures, but no glue on the top skin between the spar, and the spar stops 5 mm from the other spar, no contact what so ever.
In my non-experienced eyes, this is not too good (if it's fatal or not, I don't know, but surely not ideal..) ?!
I sent pictures to SM, and was offered two new wings at a discount...
My friend beefed the area up, so it's better than new (!), but if he hadn't opened the wings, don't know if this could/would have been a problem eventually in flight?

(oh, the two alu tabs that are supposed to keep the wings attached to the fuselage was also pulled loose, luckily (!) before the first flight !)