Great post, with really useful tips for fit!   Just had my first CIEMs done and your post made a real difference to the comfort in my normal listening position (which as a listener and not a singer is different).  

glad to hear you got it sorted! poor sources like laptops often create a lot of noise which is picked up on good audio equipment. I found that my processor was the cause of most of the noise and I could cut it out by downloading a cpu clock and monitoring program that allowed me to cut out...

Have you got your WA22 problems sorted yet? I was thinking of ordering one but don't want to have to deal with reliability issues as I live in the UK   Good luck!