@ThomasRoderick Well you can be sure there will be plenty of subs from me in the future! You should also keep an eye on NFIGMT here, he might end up building an awesome sub of his own from scratch at this rate :) He seems to have been working with my subs for some time now, only a matter of time till he makes his own!
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As for controls, that would certainly be nice though they are pretty simple and intuitive. Pitch for pitch, Roll for Rudder, VTOL to dive and surface, and throttle for throttle. This sub engine in particular also comes with a Reverse that can be accessed via pressing LandingGear!

@MintLynx Fellow aspie here, the sub is cool as hell, the engine design is also what I'd envision for one (I myself suck at art or aesthetics, but I'm somewhat good at analyzing). Also, am I the only one who thinks that whoever made this really should add control instructions? Ayways, this sub is cool and I wish to see more subs of this kind from you in the future.
* sonar ping intensifies *

Oooooh I love this! :D That propeller looks awesome! And interesting engine there!