OK, Scotay, bear with me. Let's see if we can agree on some things. I've just tried this again, on a half a dozen brand new Boges. Plug the center post. Use watever that fully blocks just the air inlet. A pointy toothpick has no effect on anything lower down. Make sure the plug is airtight, just moisten and push the toothpick in so it's seated. Or use some modeling clay, or whatever. Then blow or suck on the carto body. Are you able to blow/suck?
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