This is interesting, thanks for sharing.
Do you also have a process to remedy the remotes that fail to pass your pressure tests? Or do they just get sent back or binned?
There have been a few different failure methods identified.
Buttons - which were originally glued in, but are now are over molded and almost always perfect.
Bottom handle, due to microscopic pin holes during molding - very difficult to pick up visually, but show up easily in the vacuum test.
And occasional assembly errors with the main o-ring.
It great picking up the faults before they’re get to the customer as it means we get good data on what to improve - rather than the “remote leaked”
Any failed remotes are opened and I repair by swapping out the faulty parts.
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I wonder how many Flipsky and Maytech remotes would survive this 
Maytech has upgraded the springs since last year, better quality.
Flipsky VX3 PRO died unexpectedly out of the water.
In the evening turned on fine with half full battery. Then in the morning want to enter water, it didn’t turned on.
The display does not turn on even when charging. No vibration. No ability to do anything even without display.
11 month old. A few tens of sessions in salt water.
There is slight something under the display, may be that is the reason, but there was not any warning. So similar to the above posts, just for the PRO version.
Frustrating. What low quality of products
I also had their controllers and engines destroyed.
A low-level company, without proper customer service
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so since yesterday i got these blackspots on the screen.
which suprised me since, last time i had water in, i flushed it with isopropanol and dried it in the oven a lot. I then flushed it with epoxy.
I would appreciate it if anyone in this topic that hasn’t already posted please make one in this new topic. This would help our community.
Thank you😀