Whipple on road course
There are lots of posts under Open tracks, etc that have great info on the Whipple on a road course. You'll have to do a search.
I'll just say that it works fine but is overkill. Maybe the 15 lb but it takes a lot of careful foot massage to keep it straight with the 19 lb that I have. I wouldn't have it any other way though.
On Oct 5 we'll have 6 GTs at Thunderhill in NorCal. 2 GTs will have 19 lb Whipples. Stay tuned for the after action report.
Ed