I got to do some plumbing on the engine. I find it interesting that cooling hoses and heater hoses carry the exact same temperature coolant - it is just a question as to whether it is going to heat the cabin or cool the engine. It also reminds me of how glad I am that I am using a water-cooled Rotax engine so the heat I get in the cabin comes from a heat exchanger rather than pulling air from around the exhaust pipe that I *hope* doesn't have any CO releasing pinholes in it. I would also like to add that the "wobble extension" for a socket driver is one of the best inventions known to mechanics! And, as a special bonus, I'm uploading a video with engine guru Shawn in it and Sling guru Jean narrating. I couldn't upload the video, but you can see it here - https://www.dropbox.com/scl/fi/inkpg5ps2wza6f1ba1fbn/Engine-Heater-Coolant-Hose-Installation-with-captions.mp4?rlkey=j9reqc1io02u9rl8y0rx0cu4x&dl=0