Benjamin we adopted many traditions from the RCC. A gentleman by the name of William McComas and his wife donated the land and built the first building that served as a place of worship. Prior to a formal place of worship getting built a gentlemen by the name of Samuel Rogers led a multi-denominational group of Christians for worship. The church has maintained this non-denominational approach for almost 200 years now. I believe Rogers family roots are traced back to the initial reformation movement.
As far as believe in all 73 books what do you mean by that? We’re guarded to use them for doctrines of faith because Jerome himself as well as many popes stated they shouldn’t be. They’re good for edification because they fill in the gap from around 400bc forward. We partake in the Lord’s supper every week and certainly believe in the real presence. We don’t use the term transubstantiation because that doctrine doesn’t make sense. Not trying to derail your thread here. We observe many traditions that go back to the early church. Lent, Advent, All Saints day, etc. etc. Those traditions are a rich part of church history.