Was at a B2B trade show yesterday. Thanks @stickstones. I was given a rosin demo by the Oil Slick guys at their booth. They had a Remington Wet to Straight iron and a D-Nail press there for demo. The guy told me he gets better results from the Renmy. He used hops for the demo. Pressed between their Oil Slick Foil Backed Parchment. Foil side out to the heat. First time I had seen this done in person. The dried hops yielded a surprising amount of oil. He recommended dry material pressed into a puck with a pollen press for highest yield. Keep in mind, I haven't tried any of this. I did but a roll of that foil backed parch though.