Yes. Some long 510 positive pin atomizers might bent Cthulhu tube contacting shrapnel out. That is why we post a guide on our site:
https://www.cthulhumod.com/cthulhu-tube-dont-fire-with-new-atomizer/
Our team received 50+ emails to check if the chip is safe to use last night.
Those style chip had been used since 2014.
our design team add some new protect functions: atomizer short protect and reverse battery protection.
we also suggest users make their coil resistance > 0.5ohm when using 18350 batteries in the user manual.
The mod tubes come with insulators too.
the worst that could happen is the mod not firing. it won't be dangerous.
I think Todd don't make it clear on his video.
about atomizers might bent Cthulhu tube contacting shrapnel out. we got some suggestions from a user. we will add a silicone to contacting shrapnel.
Thanks.