Vex:
The perimeter walls are 12" high. The troughs are made frm 3 pieces of PVC pipe to form a gutter. The middle point is about 2" lower than the side pipes.
The gutter starts will start out near the audience even with the top of the VEX perimeter wall but will slope downward toward the field resting on the 6" tall algle perimeter of the large field. The trough therefore drops about 5 or 6 inches over the 10 ft run. The vex robots will have to lift the balls over the 12" wall to put them in the trough.
The main field is symmetrical (bad drawing). The baskets will be half way (middle) at the 12 ft mark.
Large washers will be placed on the VEX field to keep the balls in position at the start of the match.