While I was on the staff at the BUB meet, I was lucky enough to be standing next to an engineer while he asked Tom Burkland [who did a great job running the short "mountain" course] some very good questions, Tom said that traction was a major issue, there was no way he could use all the power he had, I believe he said [don't quote me] he could only use around 73% of available power, the one factoid that stuck in my mind was the fuel consumption, 78 gallons per run, YOW!!!