Isn’t there a point of diminishing return? I would think FX would figure out what the optimum volume would be to match the valve Size, fill pressure, spring weight and so on to get the best overall performance in shot count, with in the best velocities that pellets and slugs like. I really think we are at the limits of what an airgun can achieve with the limit of air pressures , O rings and volume in the bottle. Is it really worth the expense of voiding warranty or screwing up something to get 10 more shots out of a fill or get an extra 20 FPS ? Accuracy is paramount , then shot count then power/ FPS. And FX and a couple other top manufacturers are giving us the best technology and performance as it is developed. I get it wanting more out of my toys, more horse power, more chrome, more velocity, more more more. But as I got older I realized there’s always trade offs for more and it really isn’t always the best result in the end or reliable.