Those welds on the bottom of the cone look quite nasty.
I know that commercial breweries go a long way to ensure their stainless steel equipment is spotless on the inside, with great attention to detail especially along the welds.
That is probably due to sanitation reasons. But then, maybe I got a wrong impression from the photo.
Anyway, I am interested to know how your fermentations go in the future. If you have the opportunity, I would invest the few extra bucks for an experienced welder to make nice clean welds for you.
It seems as if the main body of the cone is made from two sections (vertical - upper and lower section) welded together. That is how a proper weld in fermentor should look like.