I know all about wanting to scrape it clean and used to do just that with my BX and its blower, when I did the driveway with that (now use the L w/cab and L4479). That was some time ago and the driveway was in better shape. It is unfortunate, but the driveway is not level and actually has a few crowns! It is a long common driveway, in addition to my own. It was all incorrectly done years ago (actually got all the money back for it) and as time went on people drove on it (as well as all the Amazon, Fed Ex, UPS, etc. deliveries) there are actual tire indentations within the pavement along with a few developing holes. I have the shoes set about 1/8" -1/4" lower than the cutting edge and follow up with a rear blade that I have fully lowered as a 'sacrificatial' scraping edge that gets the top as clean as I can.