As I sit on my couch with graph paper trying to design my layout, I've come up with what I think my track plans are going to be. Then it dawned on me, I know the dimensions of area where buildings will sit around the track plans, but what if I cannot FIND ones with the dimensions that I need (for example a mining operation, turntable/roundhouse or train station)? (I'm not good at nor do I want to scratch build). Should I purchase buildings first and then plan the layout around those, or should I just do my best in finding the right buildings that fit into the correct spaces?