Yeah, that looks like it was caused by stress on the neck. The cracks that I are below the tank seal, where the metal tube seats. Those cracks... could be a lot of things... The plastic and tube could be stressed due to manufacturing, then add in the stress caused by the pressure seal...
Two out of my three evods show cracks in the same area, and I see similar breaks here... that the neck is also the point of failure on tanks that tried caustic juices tells me that it's just a design weakness and there isn't much we can do to avoid it... just hope you don't see a crack.
Two out of my three evods show cracks in the same area, and I see similar breaks here... that the neck is also the point of failure on tanks that tried caustic juices tells me that it's just a design weakness and there isn't much we can do to avoid it... just hope you don't see a crack.