The only reason for a curve in a race car is to start it. If you can start it with it locked have at it.

I've never had a trans brake and have always foot-breaked and always prefered locked out for the above reasons. But the current combo in the car has a curve in it because at anything over 28 it won't start.And running it at 27 was burning the coating off my headers. Otherwise I would have left it there.