Umm, I fail to see (pun intended), how leaning with your eyes closed and not watching (therefore effectively not having) the engine monitoring gear gets you the correct lean settings. To me that sounds like just as much guesswork as lean till rough then enrich a bit.
Maybe jabba was watching the gauges and told the lady with her eyes closed "that's correct stop there". Learn to do it in 2 seconds, doesn't sound like it's all that difficult compared to these monkey brain turbines
Ultralights, I very much agree that going to courses, diving into extra material, publications etc for developing ones knowledge is paramount. I've just stated that for me, courses on things that I don't operate now nor intend to operate anytime soon are pretty much pointless. It's like you going to a course on Airbus or Boeing systems if you don't fly it nor intend to fly it!
By the way, it isn't possible to mag check my engine
