AltorX

Wow, are you me? I had exactly the same frustration for that specific cannon after seeing a friend's shoot across the room. I wrote them a letter also, my parents helped me, and I included the "defective" cannon in the envelope. They sent me it back with the same reasons (safety concerns). Hah!

Does anyone know the actual % effectiveness of masks (preferably including fabrics used in home-made masks)?

It would be an easier sell to people if I could just say ,"it's not 100% effective but estimates by studies show it to be about 20% effective"

I'm all for this. Can't hurt and might help.