About the flavour issue, you guys are going to laugh at this......
I got a plume veil a couple of months back, was super exited about playing with it and new to building coils so changed them out evry three or four days or so (its fun!). Was feeling pretty good, chucking clouds and king of the world. Then one day after changing the coils I started getting this horrible burning plastic taste, but couldn't figure out what it was. Washed it out, changed wicks, changed juice, everything. Put it on the shelf for a couple of weeks, then came back at it determined to figure out the problem, took it all apart and discovered that I had built the coils too high, and that the plastic thing that controls the airflow by the drip tip had actually been touching the coils as they heated and that the burning taste was not only it melting, but my own sense of self worth. Just had to sand it down a bit to get it smooth again and it was fine. So if using 22gauge to make macro coils, from personal experience, I would recommend not letting them sit up too high!
Nothing like seeing your own stupidity up close too keep you humble.