Why is it all the Martin lineup has an old school standard cable guard with a slide? I mean isn't the industry standard these days seem to be roller cable guards on most newer bows? yet the Martin lineup is still offering a cable guard setup that looks like it came from the 80s or 90s. I am not saying this is bad. I am just wondering why with all the 2012 innovations this is all they have for a cable guard? Can a person order a roller guard from rytera and bolt it right on a Martin bow or is it even able to remove the cable guards? It appears as if they may be pressed in the riser.