I finished the Osprey II build, other than Baffle paint and Cabinet finish. I’ve been listening to them for a few days now and I can’t express enough to you how good I think these are. I tried them at 1 ft3 sealed and 1.5ft3 vented. I prefer the vented as it integrates better with my sub. I also removed the throat screens and replaced them with silicone O- rings (to fill the gap) and I believe this helped to smooth the upper end. I don’t have measurement gear, but it is audibly smoother and more complete (for lack of a better description). It’s not a huge difference, but it adds that little bit of extra detail. Thanks again for a great project.