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Caminus says:  "It is theologically impossible that the 'Church of the Sede Vacante' is the "true Church" because it has no authority; it possesses no jurisdiction, ergo, it can lay no claim to Apostolic Succession, a necessary mark of the true Church of Jesus Christ.  You are, sir, a modern day schismatic."

Surely you are aware that Bishop Thuc was given special permission by Pius XI to make bishops without always having papal consent ( I assume due to his work in Vietnam where access to the Pope was not always possible ).  

During the Vatican II crisis, Bishop Thuc used this permission to make more bishops, who in turn made more priests.  This is the apostolic succession.  The bishops and priests of SSPX, the Lefebvreists, also have apostolic succession -- at least those who weren't invalidly ordained or consecrated in the Novus Ordo rite and then just allowed into SSPX -- and many of them have left SSPX and become sedevacantists.  

If the time ever comes to elect a new Pope, without this Pope coming off like a home-brewed eccentric -- meaning sedes need more power and numbers before they can take that step -- the electors will come out of these two lines, the Thuc and Lefebvre lines.  Unless there really are hidden Siri cardinals out there -- but how would we know that isn't a hoax?

As far as jurisdiction goes, the Church of the Sede Vacante as you put it has supplied jurisdiction, just like the bishops and priests at the Council of Constance during the Great Western Schism when no one knew who the true Pope was.  Because some of these bishops and priests were serving men who would later be known as anti-Popes, not all of them could have had ACTUAL jurisdiction until it was granted to them afterwards by Pope Martin V, who they put on the Throne of Peter to end the confusion.

That's right Caraffa.  Benedict XV is by no means an anti-Pope but Catholic Martyr is desperate to eliminate him because of the 1917 Code of Canon Law, compiled under Benny XV's watch, which says that catechumens must be given a Catholic burial.  As a neo-Feeneyite, he cannot accept reality and so he has to throw out Popes and Doctors left and right ( he says that Bellarmine is a heretic too ).  

Don't get drawn into this nonsense.  

Welcome by the way -- whatever you are!  Here is a rundown.

Catholic Martyr is the resident Feeneyite and sedevacantist.  He has made a Feeneyite convert of the young DeMaistre.  I am the converted pagan turned sedevacantist.  Dawn and gladius_veritatis and trent13 and Uriel I believe are also sedevacantists.  Parentsfortruth and Roscoe are sedevacantists in all but name, but they're afraid to say there's no Pope and so they go off into their imaginations and say that Siri was elected in 1958 ( or 1963 ) and that he has a successor out there even though they have no clue how this successor could have been elected or where he is ( so you see, they also are without a Pope. )  Prodinoscopus, Caminus and I believe elizabeth are SSPX, as is the board operator Matthew ( ChantCD ).