Hi Slobodan, are you still stuck on making the bowl part, or on some other part?

Did you check out the sink_5 version attached above? Does that result look ok to you? I can give you some more detailed steps on how that was created if that would help.

It is difficult to put a good smooth surface using exactly the curves that you drew - to make it easier I changed the ends of your curves to come down straight at the bottom instead of having a tight curve at the bottom, then used a fillet (with blend style shape) to produce the rounded bottom.

If you are still getting stuck with this approach, please post another model file of where you're at.

- Michael