During the build of my current UF I accidently drilled a small hole through the top of the wing.
I was drilling out the UC bearers for the retracts and slipped. I was so angry with myself for about 2 weeks
It was the only thing that went wrong on the whole build but I kept thinking about it every time I looked at that darn wing.
After about 6 months I got over it. Haha..
Maybe these things add a bit of character to the plane. It flies really good in any case!!