I have a bike that came with Oval Concepts Slam bars and I would like something that gets me lower. My question is do the aluminum extension available from Oval Concepts (I am looking at the S bend) come with the mounting holes in them to attached the arm rests so that I can use the clamps, risers, and arm rests that came with the Slam bar? That way I am just replacing the extensions and bolt up the other stuff and go.