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I did the course, bought the wetsones (and nice knives obviously), which has given me me 2 nice new hobbies, which may not always be recommendable. But helping out in the kitchen was a nice addition to living with my partner in our tiny appartment and the sharpening is a somewhat therapeutic activity.
Next buy (instead of another knife) should be a ceramic sharpening steel and leather strop (been using my belt uptil now).
I've got a aliexpress knock off of the lansky knife sharpener and am pretty happy with it.
I use a steel regularly, then sharpen properly once in a while with my lansky clone.
I don't normally subscribe to the standard response in the knife porn thread of learning how to perfect sharpening on a stone as life is too short. But it sounds like you're on a mission so I'd say do a course and buy some stones based on the course recommendation.