Ah, I see! I had a feeling it would be because of your climate. I was just wondering, as I'm pretty forgetful when it comes to watering neps, plus I hate watching all the water just drip out of the pots unused, so I'm always on the lookout for something to make the job easier/more efficient! I saw someone using 80% perlite a while back, so that's next on my list of experiments! Your method probably wouldn't work in my conditions though- waaayy too cool and humid.
I was also interested about the pots- I like how the moss grows on the outside, and I was thinking of growing some Darlingtonia in France, but it gets hot in summer, and I was wondering how well the terracotta works in comparison to a white glaze. Maybe if you can pull 100F off with Helis, I might be able to pull it off with a rare 40C every now and then. I have a few a few shoots to spare, so I can afford to experiment. (In northern England keeping such plants outside in the Summer is no effort, so I never considered/discussed it before)
Thanks for the info! Eventually I'll have my own method nailed! Keep the photos coming!