re lights: what about just wearing your raver lights (ie, your LED-covered fur cloak) while riding? Wouldn't that be more shiny and visible than just on the wheel which is obscured by your feet? After the last two times I had to disassemble the wheel to change a flat, I really don't want all that fiddly wiring running around inside the wheel, no matter what fashion says.

re sound: My KS18 has a speaker, and I've switched back to an on-body speaker, because the sound is better. Yeah, carrying a speaker is annoying, but sound quality trumps.

re: headlamp. Angles are not adjustable you can add MORE LIGHTS because MORE IS ALWAYS RIGHT. If you put a gopro mount on the top of your wheel, you can add one of these just while you're riding at night: https://www.amazon.com/Suptig-Dimmable-Waterproof-Underwater-Cameras/dp/B07BCC4VQW I don't have this brand, but I have similar, and its crazy. It lights very wide and pretty far. It's like having a jacked-up lightbar on your CIVIC. People will hate you but you'll pick up every possible pebble in your way.