Hi Avila, well it is a simpler process if you have a version saved off with your original generator curves. Much of the process I described above is about untrimming the model to recover the underlying base surfaces from which generator curves can be extracted. There is a tutorial on these techniques here:
Object repair tutorial

But the goal of all of that is to get these generator curves:



Currently with that curve in 3 separate pieces when you revolve it it will make 3 faces, one for each segment:



The change that is needed is to make that curve made up of only one single segment instead of 3 segments, so that it will make one single face when revolved:



The combining can be done using the Rebuild command in v4 or the Merge command in v5.

- Michael