How very sad.
I have just logged on to add the latest challenges to the list before re-issuing it at the end of the month and was shocked and saddened to learn of Heikki's demise. We corresponded a number of times in respect of the list. It must have been a terrible shock for his partner Anja-Christina. David, please add my condolences to any note of condolence you may send.
Mel