Hi Maarten,
actually this is no big deal but I thought I point this out shortly.
As you can see in the picture, the chocks are off a bit. This is no big deal at all and like in your dreamliner file this can be for sure easily fixed.
But as you can also see, even though the Ground Power is disabled you see there is the electricity cart beside the plane. When I click on enabled, it disappears. Should it not be the other way around?