There see I knew you weren't just a grumpy old man. LOL.
I put a set of the larger blades (29") on my AirX Marine
and although it starts moving in less wind
it still takes a fair amount of breeze to make the lille LED come on. I think the larger blades ARE a bit quieter but as I couldn't hear the old ones much anyway I can't be sure. I do hear a small amount of vibration sound through the hull
when I'm below decks but it is minimal.
If I could get the guy in the next slip to repair his companionway
slider I would be a happier person. Every time he opens it it screeches like nails on a chalkboard and since he comes in at all hours of the night I have to get up for a look to see what woke me up............m