iv tryed the checkerd stripes today. i havent got them to look like i want them to.my mower stripes above average just seems like they get eraced you can allways see the lines from the passes i did last . does this (checker)look take time before it could look like the ones on elm site? or can any one get great checks out of 2 mowings? no matter how many times i mow you mostly see the sraight lines instead of the checks.what am i doing wrong ?