I can only echo the words of Opsbod, Sir BC and Lil' Blue. I had the pleasure of working with Bob in the late 90's/early 2000s. Although he could be cantankerous at times, that was all part of the appeal. He was a genuine guy and I feel all the better for having known him.
I recently had the pleasure of a brief exchange with Bob and though we hadn't talked for some time, his friendly-yet-grumpy approach had lost none of its charm. I know he found a real home in the warmth of the bmi family and even though this has come as a great shock I know they have some great memories of the man.
Rest in peace Bob, you will be missed.