Cold Steel Professional Blowgun Mouthpiece

I bought the standard Cold Steel blowgun with 1.7 mm tube wall thickness and wanted this professional mouthpiece which is designed for the professional Cold Steel blowgun with 3 mm tube wall thickness. If you remove the standard mouthpiece and carefully wrap the 1.7 mm tube with tape (I used black friction tape) to increase its outside diameter along the length of the tube where the professional mouthpiece fits over, you can get a snug airtight fit just like you had with the standard mouthpiece over the standard blowgun tube. I find this mouthpiece to be superior for two reasons. First, it provides a better seal with my mouth. Second, on the standard mouthpiece you push the dart in until you feel/hear one click which prevents inhaling the dart. When you point the blowgun downward after that the dart can slip out of the barrel. On the professional mouthpiece you push the dart in until you frrl/hear a first click. You can then point the barrel downward without the dart slipping out as you carry the blowgun. When you are ready to shoot the blowgun you push the dart a tiny bit farther until you feel/hear a second click. Then blowing into the blowgun releases the dart. This is an excellent design.