Here's mine on a O72 curve and a straightaway, I like the looks much better than a big open space between the cars. Also, since the cars don't have even a dummy door, they look stupid with no diaphragm. I trimmed one section off the right hand side (powered unit), it had four folds (5 ribs) when I started, the unpowered unit only had two folds (3 ribs). Since these were used when I got them, I'm not entirely sure if the diaphragms are stock. However, on O72 curves, the extra rib on the powered unit was a problem, now they run great.
