So why not this option:
- The challenger BUILD two identical boats/sails/etc.
- The Defender gets to inspect and PICK WHICH BOAT (of the two) they will use, and select the venue/date/etc.
It works with kids and chocolate cake (one kid slices the pieces, the other kid gets first choice of the pieces.)
You should watch that sometime. The kids break out slide rules, micrometers, triple beam balance scales, etc. You will never find two more identical slices of cake. <img src="http://www.catsailor.com/forums/images/graemlins/laugh.gif" alt="" />