If Ken Updike is Bermuda Ken, then, yes, he did write it.
Unfortunately, I jumped the gun, and the story is mostly focused on the 560 tractor, and not so much the picker, although there are some nice pictures in the article.
I need to visit Ken. Last time I talked to him he was still at C&G. We car-pooled to 3-4 Cub Cadet Plow Days together. He still writes for RPM too. Think I have almost all his books too.