Nice work so far H, but slow down a bit - there's no rush, as there's six weeks left to the end of the GB. This kit deserves some attention and, even though most of the interior can't be seen, as has been said, it's good practice. OK, if it's messed up, it can't be seen - but it's worth trying.
The turrets can be fitted after the model is finished, as they clip into place. So, go back and have a look at the masking, particularly on the ball turret. There are parts where the masking hasn't covered the 'glass', and this will show once painted and the masks removed. It's a pity you can't use a liquid mask, but it tends not to work well on curved or spherical surfaces.
Good job being done though, so keep it up, but slow down - speed + s*it !!