I wouldn’t trust +Slupski consecrations.

He completely destroys the essential from here.

https://youtu.be/cn5vG8-d-B8?si=CgAzmghd5W1VMWNX

Well, that was not particularly well executed, doubtful at best and likely just straight out invalid. What interests me is that you can tell he's actually quite fluent in the Latin itself but appears to be struggling with his eyesight, bending closer at times and clearly struggling to read it, and it's his vision problems causing him to trip up.  Why don't they just print out the essential form in large print and insert it within the Pontificale?  I would say that he needs a new prescription, but I don't think that necessarily always helps.  I struggle myself even with the "right" glasses on.  But since the cause of the issue appears (quite clearly to me) to be vision problems, one can't necessarily extrapolate from one incident to all of his attempts to confect Sacraments.  Perhaps with different lighting, different time of day (which affects me), or at a different time when his prescription was more current ... he gets it right given his other signs of fluency.  Not sure, but other attempts would be in that gray area between positive and negative doubt, since unless one has specific information about some OTHER situation, it's kind of lik a "what if he did the same thing this other time?". If it were obvious that he lacked competence with Latin, one could extrapolate that to positive doubt about all other attempts   But I think this one is fuzzy.

Did Bishop Paul Petko insist on a conditional episcopal consecration following this mess-up? Did he ever receive conditional ordination for his presbyteral Orders since he has been ordained in the FSSP?

I remember Petko as a deacon at Winona. He has been a seminarian at St. Charles Borromeo in Philadelphia where he had been ordained to the diaconate by Archbishop [sic] Bevilacqua. He left there before priestly ordination and entered at STAS at Ridgefield. Petko was generally a decent guy with his own unique personality -- as many had at STAS in those days.

Requiem aeternam dona ei, Domine, et lux perpetuam luceat ei. Requiescat in pace.

From what I understand, he was conditionally ordained and consecrated by Joseph Macek.  Unfortunately, there are questions regarding that lineage. 

Interesting to know that Bp. Slupski conditionally ordained Bp. Webster before consecrating him bishop.  I had not heard that before.  Part of the problem with many of these ordinations/consecrations is the lack of any docuмentation.  For instance, when I was tonsured by Bp. Williamson at Winona, I was given Latin docuмentation (see attachment).   It would be ridiculous for someone to come along and say, "Gee, I wonder if Bryan was tonsured?  We do not have any photographic or video evidence?"  One would presume that a Latin docuмent would imply that the ceremony had been followed according to the traditional rubrics.  

On the subject of Extra Eccclesiam Nulla Salus, it is quite depressing that we even need a discussion board asking the question, "What priests believe in Extra Ecclesiam?"  As though the subject were up for debate.  The Church has already defined that Jews and other heretics must be united to the Church before their death or they are damned.  Wherein lies the confusion on this issue?