[Molten]

As far as your worries about deciding between two designs, there are many ways to decide. Below are a few means.

Combine two ideas
Majority rules
Seniority rules
Executive decision
Rock, Paper, Scissors

My favorite though is to spend two hours on each design coming up with dimensions. Some designs don't have dimensions that can make them work reasonably. One year, we spent what seemed like the first two weeks and didn't even have a base designed or any idea what it was going to do because of conflict. I sat down and did some basic drafting to prove that some of the designs people were so passionate about simply wouldn't work. Hindsight, would we have gotten those designs to work? Probably, most designs can be forced to work. We just went with the most practical. The point is that we decided. I would suggest you try this method and if your getting nowhere, try one of the above.