I was going to make the door hingible, but this project dragged out longer than expected and I just wanted to finish thing. As for where the sponsons are, well if you look on the box there's one pic of a BT (I think) showing the sponson in front and one of an ultramarine with the sponson in the back. I put them in front cause honestly, you jump out of a hatch do you want a lascannon or bolter right beside your head