Formula R1 brake lever removal?

Has anyone got any advice on how i can remove the brake levers from some Formula R1 brakes? I undo one of the bolts but then cause that one is removed when i come to remove the other one the barrel just spins around. It just seems like a impossible task.
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2 undo the pivot bolts and unscrew the reach adjuster to remove.
Parktools :?:SheldonBrown
I downloaded the manual but it does not cover lever removal?
It seems far from easy to undo both the pivot bolts due to the centre barrel just turning when one bolt is removed?