I purchased a Dead On Industries ring for my NL Pure's and I called to purchase a plate for attaching it to my tripod. I spoke to Rob and after talking with him, I mentioned I wasn't happy with the fit of it. He said to look at Krestrel ring. He explained the ring is 3D mapped to the Pure's design and I purchased one with a tripod adaptor after he said that. If your in the market for a ring to fit perfectly to your NL Pure's, this is the one for you! Great customer service from a great company!