Airfix C-47; Wing roots

I dry fitted the upper wings tonight and oh dear...

The gaps at the wing roots are horrendous, particularly on the port side. I did think that the wing root inserts were the problem as I fitted them flush to the fuselage by mistake and they need to protude a bit but not to that extent.
Admittedly its just a dry fit of parts but that must be the worst fitting wing joint I have ever seen in over 40 years of modelling...wow! Hopefully when I glue and tape the wings to the fuselage it will improve but initial thoughts are that it's going to need a LOT of filling. Hmmm.....