I'm part way through installing my new Gilles rearsets. On the rear brake lever side, the spring from the brake light switch attaches to the lever arm. Is this the only spring that returns the lever? The stock rearset has a second spring to return the lever. There is no mention of this second spring made in the fitting instructions. Is there just one spring as it seems a bit feeble and is attaches to a switch and not something solid.