Greetings from the US,
I have 2 of these kits and they are a REAL pain. There are numerous problems with them from not being true to scale and having numerous air holes in them. I have spent roughly 2 years on one of them just to get something to look close to the real thing.
If you have some spare F-16 parts, you can come pretty close to getting the kit up to speed. That is what I did. My cockpit is from an F-16C and the weapons stores are from Hasagawa's weapons set. The landing gear bays need a ton of work. I used a spare NLG bay to get something close. The MLG bays will need to be scratch built. There is little room to get anything in them the way they are.