If the V6s had replaceable batteries and removable sd, I would of went with it, the Fifish is a very stable underwater drone. I get a bit shakyness when changing direction with my Chasing M2, still love it though, both solid drones.
What does that lake your at have no fish? lol I see ya got a tiny one on video though!
You should get the
spring loaded claw or
net by Dirty J Designs, the net be a cool modification for picking up that bier bottle.
Bummer about the depth and posture issue, I'm sure QYSEA be able to get that sorted out with some new software updates. The 3rd issue, yeah what's nice about removable sd card, I just remove it from my M2, then plug it in my desktop or laptop very easily. I had a similar issue with the Geneinno T1, had to buy a
wifi usb adapter just to transfer the video files to my desktop's hard drive, at the time I didn't have a laptop, and I didn't have wifi on my desktop.