On page 27 of the instructions you have to place the large black plate on the frame. However, there are no other pieces registering its location. Make sure you have it centered! Unfortunately I placed it one stud forward.
I didn't realize my mistake until page 227 when you're supposed to place two corner pieces in a gap which didn't exist on my model. Now I have to pretty much disassemble the whole thing to fix it. I have put together hundreds of Lego sets and around ten of the big car sets. I've never made a mistake to this degree.
I'm going to blame the design/instructions on this one. I'm not sure how I progressed so far into the build without issue. It is super frustrating to now have to rebuild it without the benefit of numbered bags.
This is really a good build for the Batmobile enthusiast and it goes well with my other Lego Batmobiles. Awesome details. I really enjoyed it and it took me about 4 hours.