I used the factory coils, but found them lacking on my M class. Didn't really like the Ni myself.Thanks for taking the time out to reply, Yeah I just raised settings I got better vapour but flavour just isn't there as it is with the RX200 and will go for Ni and give it a go. Think its time to go to the rba with Ti, I have Lemo 2 to fall back on. Thanks again.
The RBA with SS though, I love it.
Careful with the wicking or you'll have a fountain not a tank. I learned how to wick the Crown after a few "Grab a rag" episodes.