You know, I'm just thinking out loud here, but the mechanism is such an improvement over the old type that it would easily be worth twice the price if it was built to those tolerances. There might be some money in making replacement parts and offering a tuning service. I don't have those skills but some have made money rebuilding and "supercharging" Sheridans (for example). It's a fine little rifle as is and Air Venturi service is pretty sharp.
Mine has been shooting pellet on pellet, well penny sized groups, at forty yards on a calm day. The trick is to get a shooting rythm going so that the pumping always takes the same amount of time and the shot follows that at a consistent interval. There are lots of ways to achieve that. It is important information to the hunter because we know there is a cool down after pumping. As I've mentioned elsewhere I think 12 pumps is probably what a 15 pump charge cools down too after a few minutes of rest. It then seems to be constant if the gun is holding pressure, even the next day.
Mine has been shooting pellet on pellet, well penny sized groups, at forty yards on a calm day. The trick is to get a shooting rythm going so that the pumping always takes the same amount of time and the shot follows that at a consistent interval. There are lots of ways to achieve that. It is important information to the hunter because we know there is a cool down after pumping. As I've mentioned elsewhere I think 12 pumps is probably what a 15 pump charge cools down too after a few minutes of rest. It then seems to be constant if the gun is holding pressure, even the next day.
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you can swap out the two inboard washers and that assembly for number 8 flat washers. They are a little thicker and the washers the vendor uses and they tighten up that pivot pin nicely. That results in a very different feel when charging the rifle.