well first we tried the set of bars that came off a wingless es protege but they still had a little too much tension for my cf trunk. Then we tried just one and it didnt work there wasnt enough tension so i ended up just using one msp bar. It was enough tension to pop it when i hit the trunk release but not enough up fling it up.
Are you getting flex on one side. I.e. is it pushing up and making it look funny ?