OK, I got it, I think. After eating one that was perfectly ripened, I'm 80-90% certain that these are Kent mangoes. So it looks like I got the K right, after all! It's just that it's been so long since I've eaten any Kent mangoes (over 30 years), and this is the first time eating any grown here in their home state. I intend to ask Ken (neighbor) if his mangoes are Kent. It should have been the first thing to do, right? Sometimes I do things backwards. How about you?
Also, I used to have a Providence tree, Providence is the offspring of Kent, and the flavor was VERY similar, with Providence having more of an acidic kick. 30 years ago I thought Kent was the pinnacle of mango flavor, but my taste buds have moved on thanks to all the other varieties I've had the good fortune to taste, adding more to the list every year. God bless South Florida. God bless Burma, Thailand, and India. God bless Gary Zill. By the way, these are damn good mangoes. Not a thing wrong with them, but about 7.5 on the mango flavor scale.