I said it would be an honor to be considered a colleague; so he said "GOOT!" and shook my hand heartily and said - "What ever you need - always call me!" I have never taken him up on that, but I am always warmly welcomed by him whenever we happen to meet. The generous invitation was more than I needed or deserved. Indeed a gentleman and innovator, at a minimum. There is much to the man.
Peter Ledermann