2020 Sunflower competition

My sun flowers appear to have multiple heads, should I leave them on the plant or should I remove some ?, I thinking about the weight of the head on the stem when it does open. Some of the ones I’ve seen the heads are huge and I’m sure are quite heavy.

I’ve never removed any heads. Some sunflower are supposed to be multi headed. It’s one of the competition categories! 

here’s one of mine from last summer