[R2D2DOC]

I have read "most" of this thread. And apologies in advance for any repeats.

(A) Three different shaped pieces (points assigned based on having the same or nearly the same number of each shape in the alliances' scoring): Hint #2
(B) Different hopper cars or BOXCARS: Hint #1 and Dave's picture at the Boxcar Willy Memorial Overpass
(C) Place the cars on one or multiple overpasses (again, Dave's picture). They would be secured and freewheeling (like roller coaster cars). They could be color coded for two alliances.

Arena design to make it easy to manufacture and maintain without costs skyrocketing. Scoring to be obvious like 2007 (okay some math 2^n), 2009 or 2010, and NOT like 2008.