Just bought an HW100s and I am looking for a 300 bar charging kit, I don't know whether to buy a bare bottle then add the valve, gauge etc, or whether to try and get the complete kit. What do I need, there is a din adaptor supplied with the rifle which is rated at 200 bar but I have been told I need an uprated one for use with a 300 bar cylinder (I don't really understand why because you only fill to 200 bar!) Can anyone help me identify the individual bits I need? What is to stop me getting a cylinder with din valve and screwing the HW100 cylinder straight to it using the adaptor? All help appreciated by this PCP novice. Cheers. PS Who has best prices too?