HW100 power adjustment

How to adjust the power on your HW100. This is for rifles that do not have anti-tamper. The UK legal limit for unlicensed airguns is 12ftlbs, make sure you keep it below 12ftlbs with any pellet to avoid going to jail for 5 years. Make sure you use a chronograph to check the power before, during and after making any adjustments. Do it at your own risk and I accept no responsibility if you damage yourself or your airgun. If in doubt send your airgun to a professional.