I was so close to getting my 5th diamond!
The vibe is great, I love the voice acting and how the music sounds echoey when you're out of the capsule. There's a lot of details that make it obvious why this couldn't be done in anything close to 3 hours.
I did best after I gave up on trying to drive the capsule and just tried to keep up with repairs. Next time I'll have to make better use of the sonar. It gets hectic for sure!