I'm using 400 and I also didn't roll it with a hole in the center. It wicks fine vaping at a slight horizontal position. Once you vape vertical you can only get about 4-5 good drags and then it's dry. I'm wondering if 400 would wick better with the hole in the center, so when you're taking hits it's also pulling juice up. 400 certainly does not hold up to my chain vaping, but I can work with it until my 500 arrives.
I got the same result. If you roll a tight roll with 65mm with a small paper clip roll in the center, it'll perform better. But, many gennies won't wick forever on a vertical. Some claim to have done endless vaping on a pure vertical, but I can't and don't see how. I know capillary and wicking and all that, but I can't get it to go.
