You are asking for a lot here. If you force them to use sola scriptura, their theology tumbles like a deck of cards. They consider sola scriptura a heresy, and have to have oral traditions as well.
Ah, the false gospel of Sola Scriptura! Such a thing never came to the fore until the 15th century, and you say we make things up? It's YOUR theology that tumbles like a deck of cards with it's man made determinations. We look to both - tradition and the Scriptures with each having their proper role. Jesus created a church to decide things properly, He did not just write a book and leave it to each individual adherent to decide things for him or herself.