Hello Konstantinos, I didn't knew you had your own topic, so I will post the problems I have with the Diver V2 also here below, maybe you know a solution for this problems, but to be honest, I'am done with the Diver V2 as it seems to be a useless device.
Assuming this is just improper English vocabulary, but the correct term is "unusable", not "useless". I am not criticizing, most native English speakers don't even know the subtle difference. "Useless" is more aggressive, and can come across as a bit insulting.
And, yes, a leaking atty is unusable. I run a v2 Diver in a Phiniac Phinique, works perfectly.