Sounds fun but I'm smack dab in the middle of a cycle, just flipping into flower. It'll be at least 2 months before I can crack a seed! I also don't have access to a container like that (although I could probably construct one using cardboard if I had the exact dimensions).

Anyway I would lose any contest like this because I'm growing to cure cancer, and I take my wife's medicine very seriously, so I grow for quality and not weight. I'd have no chance in a competition for the heaviest flower.

But good luck to all, it looks like a fun challenge.