Thought i read some were the durango gets made in a factory the also makes 3-4 other brands (kingstar ?) so has to share production time,not sure if thats 100% true.
I also think the popularity of the dex410 was much more than expected causing a shortage in parts as well as kits.
Biggest pain to me is my kit has parts missing and faulty parts straight from the factory. contacted durango its been nearly a month and still no parts as they dont have stock