Very sad news indeed David. There is not a lot one can say at times like this. I for one could not confess to knowing him, other than from our exchanges on SC but he certainly brought his own unique sense of humour and never ending enthusiasm to the thread, and one can only assume he lived his life in a similar way. He will be missed by us all. Our thoughts must also go to his partner Anja-Christina.
Rest in peace Heikki, aka Reg, aka RegDep.