Som pictures from the first successful test firing
The first time I tested the weapon, the trigger reset was bent due to too high gas pressure. So I had to bend it back again and then I had to file it down a bit for the weapon to work properly again.
And then I lowered the gas pressure by screwing the booster cone five clicks back.
The booster is not meant to be used as a gas pressure regulator. Using a nozzle with a larger opening is the standard thing to do. Nozzles come with a variety of sizes of holes, and are selected based on need.