I agree that the UP4 is a unipivot, but I don't know if I would call the DP6 a regular pivited arm. I would more describe it as a unipivot with horizontal stabilization. Take a look at the technical details at the Moerch site. They explain it far better than I can.
Yes, I have a DP6, and love it.
Enjoy,
Bob
Yes, I have a DP6, and love it.
Enjoy,
Bob