Very sad news indeed. Just had an email from Terry (as I'm sure most of you also had) telling of Mark's passing. Also a plan for an even at Marlin in the summer (dates tbc), which will support the charity linked with Mark's condition. A good show of Sportsters would be a fitting tribute to the man behind the design. I will hopefully be able to attend once the date is known, and hope to see some other owners there too.
Condolences to Terry, and the rest of Mark's family.