Cheap vs. Expensive Scuba Gear [I bought cheap double enders from china Vol. 2]

Is cheap vs. expensive scuba gear worth buying? I bought 50 double enders for 2$ each from china and checked if it's worth buying compared to a 12$ one from the local dive shop. After that video I got some comments that the spring is exposed on the cheap double ender and how sand and clay may enter and block the double ender. Since this might be relevant in cave diving, I used the easter weekend to test this! This is part of my series "Cheap vs. Expensive Scuba Gear". Quality has it's price, sure, but is cheap scuba diving gear always bad and low quality? I put it to a test. The non-alcoholic beer (by definition, it may contain up to 0.5% Vol.!): https://amzn.to/2XBcfIL The cheap double enders camer from: http://divediy.com/ For expenive double enders go to: https://amzn.to/2Jzs4aU