From Father Cekada's article --

Did he consider sedevacantists to be upright members of the Church?

Undoubtedly. He rebuked certain over-zealous Society priests who refused the sacraments to sedevacantists. He collaborated with Bishop de Castro-Mayer after the Brazilian prelate had made his sedevacantism quite clear. He accepted numerous seminarians from sedevacantist families, parishes or groups. He patronised the Le Trévoux “Ordo” with its guide to traditional places of worship throughout the world, which has always included (and still does) certain known sedevacantist Mass centres. He was at all times well aware of the presence of sedevacantists among the Society’s priests.

So, again, unlike yourself, +Lefebvre did not consider sedevacantism schismatic.

ABL: 

“It is possible we may be obliged to believe this pope is not pope. For twenty years Mgr de Castro Mayer and I preferred to wait…I think we are waiting for the famous meeting in Assisi, if God allows it.”

That's 1986.  It is now 2019, fast forwarding 33 years, (maybe 53 years, if you include the twenty years prior to 1986)  Obviously, ABL couldn't make up his mind.  +W, as leader of the "Resistance," still can not make up his mind. SJ advises patience as a necessary suffering we must endure, which is risible.   The neo-SSPX, of course, has not made up its mind.  But for the neo-SSPX it would not be good for business to make any kind of SV declaration.  So we know that won't happen.  It has all become a very bad joke played on the faithful. 
Let SVism, I say, become the new fall back 'Ordinary' traditional position; and let the-pope-is-pope-until-formally-condemned become the new 'Extraordinary' position for those who still love the old ways. 

ABL:
That's 1986.  It is now 2019, fast forwarding 33 years, (maybe 53 years, if you include the twenty years prior to 1986)  Obviously, ABL couldn't make up his mind.  +W, as leader of the "Resistance," still can not make up his mind. SJ advises patience as a necessary suffering we must endure, which is risible.   The neo-SSPX, of course, has not made up its mind.  But for the neo-SSPX it would not be good for business to make any kind of SV declaration.  So we know that won't happen.  It has all become a very bad joke played on the faithful.  
Let SVism, I say, become the new fall back 'Ordinary' traditional position; and let the-pope-is-pope-until-formally-condemned become the new 'Extraordinary' position for those who still love the old ways.

On the left, Fellay, Athanasius Schneider, Mattei et al want to say "Oh, if Lefebvre were alive today, he would surely have changed to support my position."
On the right, the sedes make the same claim.
But only the Resistance rests content with continuing he position he did in fact endorse.

What are you talking about?  This is +Lefebvre himself saying it.  What better evidence is there for what +Lefebvre thought than what +Lefebvre said?  Now, I conceded that he may have been exaggerating the timeframe ... or somehow including the entire post-Vatican II period in the timeline, but it he's accurate, this is indeed interesting.

I’m saying if your reading is correct, and Lefebvre was already contemplating sedevacantism in 1966, there should be some evidence of such from that time period.
Where is it?

Yes, "the Nine" merely saw the handwriting on the wall.  They saw how the SSPX was already compromising with Rome back when it wasn't en vogue.

http://www.traditionalmass.org/articles/article.php?id=48


It just so happens that today would have been Fr Joseph Collins' birthday.  

Then your narrative works directly against Ladislaus:

He imagines a Lefebvre who was becoming open to sedevacantism, while you imagine one on a relentless trajectory for the conciliar church (for which objective openness or tolerance of sedevacantism would have been counterproductive).

It seems to me that there is quite a bit of support out there to suggest that Archbishop Lefebrve was never sure one way or another...a very conflicted man.

As anticipated (above).

The church make it clear? They are not even Catholic anymore, so don’t think that is going to happen any time soon!

Doesn’t have to be soon, point is it’s never going to happen, Rome has lost the faith!