Watching the corner speed of the Xbow GT4s was amazing. During the live stream for Saturday's race, they mentioned some "overboost" issues with the sealed-unit Audi engine. I missed the live stream yesterday, so I don't know what happened in post-race on Saturday or efforts to fix the issue for Sunday. As an SCCA Marshal, we have had extensive discussions, including input from the team, on driver extraction with the Xbow's unique mean of entry and egress.