Wow, I am without words really. I haven't visited the site in months because I just haven't had the time so I am just now learning of his passing. I actually had to leave the page for a minute and collect myself before returning to post this reply. I never met Mark in person or spoke to him on the phone, but I still feel like I lost a dear friend. Mark was the type of person that left an impression on anyone he met and touched the lives of so many. I owe all that I have learned about tuning to this site and Mark. Although he deserved more time on earth, I know that at least his suffering is over and he is in a better place. I will keep his family in my thoughts and prayers. Rest in peace Mark and may we someday meet in that gearhead paradise in the sky.