I open blasted for years using glass and screen or coffee filters for personal use for many years. I recently used a pretty nice closed loop setup of a friend for a couple runs and I was very happy with the yields. Good product was coming out at around 20 % I think the lowest yield was 15% on some not so great trim. I can’t afford a closed loop system for a few months and I have quite a bit of trim to get through. Open blasting just isn’t giving me enough return. I’m getting around 10%. I have seen the pressurized columns that you allow to soak and build up pressure then recover your product. These systems are a lot more affordable for me right now until I can get a closed loop system. But my question is will these type of systems give me a better yield than the standard open blast technique. Will the yields compare to a closed loop system?