I have a 2007 B40. I want to convert to adjustable genoa cars, perhaps with a 4 to 1 ratio for the sheet (for the car movement). I am also thinking of having a stopper at the aft end of the genoa rail (or possibly adding a second block to the genoa block near the primary winch and then having some sort of stopper near the added block. I currently have a Lewmar setup. Suggestions as to using Garhauer equipment, or staying with Lewmar? Things that can go wrong (in doing this)? Thanks, Rick