Simon, I like the idea of the challenges, but it seems that something always gets in the way and becomes the 'priority'. For myself, I really don't care how long it takes to build something. Last year's challenge is still stewing as is my own challenge to myself: to build a loco in honor of Verne Niner. Someday, those may be finished too.
I also feel that setting too many rules is not in the interest of the hobby. Fun can come in many forms and I've seen people hold back and not start something for fear of breaking the 'rules'.
Anyway, this was just an idea. Hopefully it will trigger some more activity here again.
Oh, there are a couple of pretty good pictures of Gerry in some of the old threads. I will attempt to create a 'likeness', hopefully it won't be too grotesque of a likeness.