I had one head that was just DOA. Finally just gave up on that one. Another I had trouble getting started up. It finally fired after I stuck the
tank on the VAMO and just kept trying. Other than that, the rest seem OK. Purchased from DV. Like you I had ordered some extra coils, thank goodness.
How is everyone CLEANING the coil units when you change juices? I don't really understand the "take apart and dry burn"... is that neccesary?