You might want to go back to Scripture on that... Interpreting Scripture is not a matter of one's own private revelation (2 Peter 1:20). Left to our own devices, we distort Scripture in our lack of understanding to our own destruction (2 Peter 3:16).
More on the problems with Sola Scriptura from a previous discussion. We tend to do this a lot around here...
Private interpretation is gnosticism.
But my post 53 and you will see that your argument for more than Scripture must come right back to Scripture or error.