im confused about my MMM and the anti scalp feature. are the wheels suppose to be riding on the ground or not? the manual is kind of confusing me, and the more I read it the more frustrated I get. back in January, when I got my BX, the dealer said it was set. of course grass didn't needed to be mowed until about now. I reinstalled it the other day and was messing with it. can someone with more bx experience help me out?