Hi everyone, this is my first post. I've recently gotten back into LEGO and I'm having a blast. I'm trying to replicate the MARTA train at the Atlanta LEGO Land. After a few nights, I just can't figure out how they made to doors. I would greatly appreciate any help or hints. Here is the best picture I can find...thanks to http://yazminwickham.com/a-visit-to-legoland-discovery-center-atlanta/