Yeah I read about them somewhere last week, might have been vaping underground. Some say good some bad with leaking. I saw the SXK bridge & coils on FT and I think NV sell them.
So far I’m really enjoying the EUC ceramic & nautilus mesh coils. I found the naut 1.8/1.6 BVC’s & Clapton’s a bit crap (these were good in my nautilus mini though!) so almost gave up on that bridge but took a punt on the mesh heads and they’ve been great so far.
There is a not so good review on the SXK bridge & coils with the leaking issue on FT. I think in the discussion section there is also a complaint about it only working with the SXK coils and not the EUC's but would need to read it again.