[Adam Skelding]

The Manual shows how to install the brace in the most rigid condition.
To allow the flex system to work, simply remove the washer from the front screw.
This allows the flex brace to move for and aft in the slot according to how much pre-load you put on the rubber bush at the rear. You do this buy altering the amount of washers you put either on top of or below the bush before tightening the rear screw hard down. (Below is neater as you then don't see the washers).