Woah, woah! Go back a step! When we fixed the corrupted object a few posts earlier, this fixed the diagonal lines and that bump you are seeing at the bottom in smooth preview.
I wouldn't mind starting from sketch again, but unfortunately I would make the same mistakes as the tutorial I used and the tutorial you posted (which are the same), have rather vague instruction e.g. "Correct areas of the car" instead of use "Banana Tool" And "Do this with that tool".
"What you should have done was to select the large edge and press [2] to cut it in the middle; then you could select the respective vertices and connect them. " - Regarding what you said here, hitting [2] added a vertices in the middle and allowed me to hit 'c' towards the two corresponding points. This worked perfectly (for the top of the car roof), and I might be able to get away with this. Unfortunately if I had to add two more symmetrical lines left and right of the middle line, I would not be able to pull this off using the same technique!
Edit: If you wish I can upload the updated model from the previous step, which removes the diagonal line. Oh and would you please be able to respond regarding Image 2, of the previous post.
You are making for a good tutorial though, teaching me all kinds of commands!
I wouldn't mind starting from sketch again, but unfortunately I would make the same mistakes as the tutorial I used and the tutorial you posted (which are the same), have rather vague instruction e.g. "Correct areas of the car" instead of use "Banana Tool" And "Do this with that tool".
"What you should have done was to select the large edge and press [2] to cut it in the middle; then you could select the respective vertices and connect them. " - Regarding what you said here, hitting [2] added a vertices in the middle and allowed me to hit 'c' towards the two corresponding points. This worked perfectly (for the top of the car roof), and I might be able to get away with this. Unfortunately if I had to add two more symmetrical lines left and right of the middle line, I would not be able to pull this off using the same technique!
Edit: If you wish I can upload the updated model from the previous step, which removes the diagonal line. Oh and would you please be able to respond regarding Image 2, of the previous post.
You are making for a good tutorial though, teaching me all kinds of commands!