I associate with a non-denominational church of Christ where others that believe in a similar manner attend. We discuss Scripture, and don't always agree.
Now you write:
My local assembly is an autonomous, independent congregation of like-minded believers modeled after those of the New Testament.
You're not "like-minded" you are all practitioners of YOPIOS and prove that sola scriptura doesn't work or else you would all be in complete agreement.
It was further study of Scripture that led me away from TULIP Calvinism.
Further proof of the fallacy of YOPIOS, it just doesn't end. At the start of the Reformation, Luther left the Church. Soon after, Calvin left, but he didn't agree with Luther so he started another group. In the five hundred years since, thousand more splinter groups have sprung up, none of them agree with one another. If scripture was really so "simple" that any Christian could grasp it, none of this would occur.
Not sure what YOPIOS is. But I never said we were in complete agreement. I'm not sure that is even possible with any group about anything. Nevertheless, I'll take a healthy discourse of competing ideas over the iron maiden to keep other opinions from seeing the light of day.
Paul instructs Believers to "work out your own salvation with fear and trembling". He did not say, "entrust your salvation to an organization of man". It is incumbent on each individual Believer to seek truth and apply it in his life. God has provided His truth to us through Scripture. Study it. Apply it. And Pray that God continue to enlighten you with correction.