I have been overseas in Thailand and just read of Sheldon's passing.
I spoke to him on several occasions. He seemed to always have the time to listen and help.
The amount of energy and time he took to answer questions either by phone or email is hard to image.
Although I didn't speak to him for over 5 years, his presence and knowledge was easy to access through his unbelievable website.

RIP Captain Bike and my best wishes to his family.