yeah, but both days had good temp/humidity. I think the biggest difference today had a slight head wind. Also, today they had a make up day so it was full full full!. I got 1 run, and didn't want to wait another 2 hrs for a 2nd. I may have been able to play with shift points a little with the different intake. I lost a little over 2 mph, and I don't think there was any making that up, regardless of days, shift points or anything else.