Glory to Jesus Christ!
Dear Joe:
The problem with the sedevacantist thesis is that it is a Protestant/Non Latin way of dealing with a fallen Pope and Papacy. As you know Joe the Canons of the Latin Church have a provision for the anathamatization of a heretical Pontiff, but this is to be initiated by the Holy Office or now known as the Congregation for the Doctrine of the Faith. The rather unfortunate thing is that although lay people have a right to decry heresy in traditional Catholic theology, they cannot judge a Pontiff who is a heretic; only the Curia can investigate these matters and make a decision and invoke an ecclesiastical court to make a decision. Now here comes the clincher: the party line in the CDF is Vatican II and its subsequent development and theology. That means the CDF will not be convening an ecclesiastical court any time soon to depose the heretical Pope of Rome.
Now the ultra-sedevacantist thesis is that world Catholicism with the last four Pontiffs and Papacy are apostate tools of the Devil and now only a small remnant is extant: therefore the lay Church must elect a new Pope and a New Curia - and as in the case of Pope claimant Pius XIII; because no bishops can be found we, Pius XIII aka Father Pulvermacher, will ordain our own clergy from the potential lying within my priesthood, after our election to the Papacy to confer Holy Orders and "re-start" the Catholic Church.
It takes no time or discernment to see that this thesis is the product of extreme suffering on the part of traditional Latin Catholics; who see that their beloved Church will never, in their lifetimes, return to it's former glory before the Council. I think Joe this is where Orthodoxy comes in; the Orthodox Church that you left and clearly did not understand or you would not have left.
The Orthodox Church is Life. A Life in the Holy Spirit. The Head of our Church is Jesus Christ who neither needs a Vicar to act in His stead nor did he appoint one in St. Peter. St. Peter was the first Patriarch of the Church of Antioch before Rome, but Rome not Antioch took the position that it was not only the First among equals, but also the Church that all must be in Communion with to be be saved; and that all Apostolic Authority flowed in and through the this same Pope of Rome. This of course was developed later, and as you know many Popes objected to being called "First." These Popes were Orthodox.
Skipping past the historical let us go to the Truth; because history is always viewed with rose-colored glasses. The Truth is that because Christ is the Head of the Church she will never Change; She will never go past the Norms of Holy Fathers; She will never fall. In Orthodoxy heretical bishops will always be deposed. Our hope is neither in Supreme Pontiff or Papacy. A Bishop can never be "Tradition" or be infallible when speaking "ex cathedra." Orthodoxy is local. The Orthodox Catholic Church is where the Bishop is with the reverend clergy and faithful in Communion with him. If the Jurisdiction falls away from true Orthodoxy then we will call our people together with the Faithful clergy and start another Jurisdiction; In Orthodoxy this is not a problem because again where the Bishop is there is the Catholic Church. So we are not tied to a Rome or an Antioch or a Constantinopolis. We are faithful to Orthodoxy. Patriarchs have fallen, Bishops have apostacized. The whole Church at one time was reduced to a few faithful as per St. Athanasius, but the Orthodox Catholic Church still survived. Your problem is that you are trying to have an Orthodox ecclesiology as a Latin Catholic. You know that these Pope claimants are either in need of psychiatric help or are not following the true canonical process for electing a Counter-Pope. Herein lies your delemma.
The reality is that until the heretical Pope in Rome is deposed, and Latin/Papal Tradition is vindicated through the Congregation for the Doctrine of the Faith or over 2/3 of the Church revolts and desires a return to tradition, and have Cardinals and Bishops to elect a Pope and convene an Ecumenical Council, that all these other efforts, "Pope Pius XIII, CMRI, SSPV et al, will end up as vagante groups (many of which are); that you must be under the Jurisdiction of the Ordinary of the Diocese in which you live and must seek the traditional life and Liturgy through the ordinary valid processes of the that Church.
Athanasius Contra Mundum.
St. Athanasius was Orthodox and so was the Church of Rome; but it has since departed and is reaping the fruits of her separation from the Holy Orthodox Catholic Apostolic Church of the East. Any group that departs from and separates itself from Orthodoxy will self-destruct. Once you are cut off from the Vine you will wither and die.
True Orthodox ecclesiology is based on the reality that only within the Orthodox Way can the priesthood and the Hierarchy function with the uncreated Divine Grace of the Consubstantial and Life-Creating Trinity.
In Orthodox ecclesiology if a Hierarch has lead the Church into heresy or is a heretic he is to be anathematized and cast out even no clergy will do so and only the people who held the Orthodox Faith will do it. But within Latin Catholicism it is different. "No one may judge the Sovereign Pontiff","the Pope is Tradition", "The Roman Pontiff is the source and highest form of Authority on the Earth; he is God on earth" "Not even the Church may judge the Pope" et al..These are paraphrases of well known statements that can easily be found in Denzinger.
The problem is these statments were made by "orthodox" Popes; now you have "heretical" Popes who use the same power, but for a different purpose. In Orthodoxy there is no problem with heretical Hierarchs and clergy, because if they are found to be so they are Anathematized and are no longer in the Church.
You left Orthodoxy to become a sedevacantist and ultimately a vagante catholic? What a shame and a very sad time it must be for you. Like I have said before the pain of Latin Catholics who observe their traditions is endless. It is as if your Church has forsaken you. The reality is THE CHURCH of JESUS CHRIST has never forsaken you; unfortunately the West has been beguiled into thinking that this thing called the Roman Catholic Church was "the church", but the reality is that only the Orthodox Church is THE CHURCH; that is the Truth as can not only be demonstrated by history, but also in the Life of the Church.
Search your heart. Listen to and Experience the Truth of Orthodoxy and you WILL return to Orthodoxy. Your problem is you were too into the politics of the Church and not into just saving your soul and achieving theosis. This I, a sinner, have been guilty of on more than one occasion 
Orthodoxy is Life. Return to Life.
In St. Athanasius,
Alexis
