One of which was the neck bungs. The neck bungs on my tank were not in line with each other, with one of them also being sunken about 4 mm lower than the other.
To solve this, I'd ordered some new neck bungs from Lowbrow Customs. Since I wanted to use their Triumph style gas caps down the track, it was a no brainer to make this mod.
The new bungs are a much larger diameter, however, with them being more even now, I think it was worth the effort.