And the ad hominum post starts as the "argument" is being lost. I'm waiting for the adjectives "harmful and dangerous" to be used. There may be a straw man in there somewhere but It's not worth digging imo. I really wish I could find the article where an old master of brass winds, not just trumpets, referred to them as "double reed" instruments, with the "reeds" being you top and bottom lip. The air compressor analogy is great! I'll also throw in the 1,000 cfm air blower. You have speed (fast air ) AND volume (belly push ) in one machine. Don't press any valve down though unless secured. They will go flying!!