Terry, you have pointed out a great deal relating, and in no way belittling the efforts of Ivan you must remember that the vast majority of posters on this site are from NZ and most (I suspect) would not know of Ivan. While I read the post, I had absolutely no knowledge of him.
It is exceptionally sad to see people of his ilk pass, 157 people had read the thread, his passing has been noted, I guess most had nothing to add.