Originally posted by Taylor-Racing
Yep, agreed, but I just figured the car has a right side brace and a left side one would be needed to link the rear bulkheads to the top plate on that side.
In other words, I considered you couldn't stop the torsional loads with just one side brace and that you would end up with a one sided torque effect . . sort of.
. . . 'course I'm speculating here, since we haven't run the car with a left side brace at all. 
Dont know about this. Sounds logical however.
When I tested the car with the left brace I did not like the ultra direct feel, and also found the rear grip went away a lot. Removed it and the car went nicely.