I still don't understand why kanger would do this when we, the customer, like the evod heads better than the protank heads for the most part.
This doesn't effect me because I i build. I have like 16 total that should last me for years, or until something better comes out.
I'm pretty sure the reason is to foil the counterfeiters putting out evod clones. A friend of mine has one genuine Kanger evod he got from me and two clones he got on eBay. The longer stem heads don't work well with the clones. The air tube is too long, causing the base not to seal properly with the tank.