I'm glad I didn't see the puzzle on April 19. It is a very enjoyable discovery with a much-loved theme and interesting surfaces. Like swarbrules @3, the SE corner is taking me longer but I'm working on it.
A bit confused about the approximate homophone at 5d, although the definition at 19a made it clear I had the correct word.
Also with the synonym of conductor used in the wordplay for 22a, which is apparently more North American.
17a made me smile (but since I don't have all the crossers yet, I may have the wrong word. I just hope I don't :)