Hi I own a GP Cessna which I just bought RTF. After putting the wing on I proceeded to screw the two bolts which attach it to a brace on the fuselage. While doing so the washer/nut on the brace came off the brace and is partially threaded on th nut. So now the screw can move freely up and down the hole on the wing and brace. Please look at diagram for a better explanation.

I am unable to remove the wing now because the washer/nut is preventing me from doing so. I tried to the wing up tight so that the washer would press hard against the brace and then try and unscrew the nut, but the washer wasn't getting a grip on the brace.

So how do I remove it without cutting out my windows or damaging the plane. Thanks!! Ajay