Hey, jimh, I visited your site and read through your thoughts on macro photography. Nice images and good advice.
The only thing I would modify is your advice on using manual focus when doing macro. Where I live it's quite windy making manual focus
a "hit and miss" game. Obviously, if you have a way to lock down your subject then manual focus is the way to go. However, when its windy
I have found that using continuous spot auto focusing returns a higher rate of sharp images. I am using a Nikon 850 camera and Nikon's 200mm micro lens
when doing my macro work. The lens is a bit dated and I would bet one of Nikon's newer macro lens would do even a better job using autofocus.
Mark