I already try copy and past and an other symmetrie ... but it still doesn’t work.
But maybe that is the problem ...
The firs time a did it (following the tutorial) ... it was not correctly weld in back top and bottom .. but i fix it so why it would be the reason ???
And anyway, the front is not really weld so i can’t understand how it could be the only reason ...
I take an old save of the first half of the top ... and it was already bad.
If i weld all parts (ring and top) ... the ring become wrong to thickness so my “one piece” have those yellow edges but no thickness ... at all :(
For now, i did other way then thickness but i’d like to understand what i probably do wrong.