...remember me when... ...you will be with me in purgatory...
No Catholic Church = no distinctive Catholic teachings that are not manifest in the only wholly inspired substantive authoritative record of what the NT church believed (which is Scripture, in particular Acts through Revelation, which best shows how the NT church understood the gospels). However, your argument is what? That the magisterial endorsers and preservers of Scripture are the sure interpreters of it, to whom all are to submit?
...remember me when... ...you will be with me in purgatory...
your own beliefs in the pre tribulation rapture and other nonbiblical stuff are not Christian, yes.