How to make this solid?

 From:  Koi
10782.19 
Hey guys,
it´s me again with a new question :)
I build a beautiful objetct with the sweep tool. And made this solid.
On the object is like a small seam to see, i made a screenshot aswell. Is it possible to get a nearly same result without that?

Best regards,

Koi

P.S. I am still working with V4 and, as you can see, not a real pro. Do you think I should switch on v5?
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