You've got me intrigued, AG. Simple test: just plug the + pin's main air inlet with say a round tapered toothpick, and break it off 1/4 above the connector, so as not to poke the throat. Put mouth around carto -- can you blow in (through the pinholes)? I can't. Boge, Kangar, CE2, Smoktech. I did just find one old carto where I can blow thru, I don't know what brand.
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@Gobbler, I'd guess where there are no options, like there are for the Silos, an out of stock item just doesnt show.

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Fernand, rather than shoving a toothpick in, cover the bottom hole with electrical tape, and you'll see there IS airflow thru the sides![]()
Why else would they be there? Lighten the carto to make it go faster?![]()
Good Morning Vmodians...
...It is an absolutely gorgeous day here in Northern CA.. On the cool side, but sun is shining. I gotta go rake a mountain of leaves, but I don't mind. At least I can be outside today.. Gona be cold and wet this weekend, YUK
!! What's the weather report where you live?
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Yup. Or even more simply, put your finger tightly on the end and blow. Absolutely works. Or if you want to SEE it, take one with some juice and do the same thing, juice will come out of those side holes. OR just think logically. Why else would they be there? Lighten the carto to make it go faster?![]()

It's been unseasonably warm here in NY (Long Island) - in the 60s. Which is nice considering we had snow flurries and wind chill temps in the low 30s on 10/29. Rain is heading our way for the next few days- but temps still look good.
It was upper 70s here in north central North Carolina today. Went deer hunting and saw the bucks running around in muscle tees and shorts catching a fall tan. Thunderstorms, rain and then turning cold Wed. nite into Thurs. morning. I guess the deer will be back in their fur coats by the weekend...........![]()

@Socotay, I don't know what you're talking about. If you plug the center post on a Boge with anything, conical toothpick or silicone, you can suck all you want on the top of the carto, it's plugged. End of story. The pinholes only connect to the connector side cup, I mean, Lawd, look at the photo! The post that's normally there seals the central hole. If it didn't, you would be able to suck air when the center post's hole is plugged, and you can't. It's physically impossible for anything to enter the carto that way. Juice can only enter through the center post.
@scotay, we must be talking past each other somehow. I don't follow your analogies. The results I get are as I described, and photograped. I can't change that. It doesn't make me "right or wrong". But YMMV, and more power to you if you can suck up all the juice so it doesn't pool.