624 inadvertantly did the "Y" during one of our first Thursday matches. The other two bots on our alliance already went onto the field, taking the straight-line positions, and were back at their driver's stations when we went to put our out bot. Afraid that our bot was going to end up hitting the wall, we were shocking/amazed/freaked out when the line tracking ended up leading "CRyptosaur" along the bifurcating reflective tape to follow the "Y". Though I can't seem to remember if we actually successfully hung a tube during that match... For some reason I'm thinking not.
From that point forward, we only used the side starting positions.