I'm just trying to get my brain around this one. I need to re-create this cake (with red gerberas only). I would like to make the tiers closer to 5" high as they look taller than the standard 4". The cake needs to serve 50-55 and I would like to use a 4" for the top tier. What sizes would you go with? I'm thinking 4/6/9 but then it wouldn't be completely symmetrical. 4/6/8 wouldn't be enough and 4/6/8/10 would be too much. Any help would be appreciated!! Thanks!