Hi Everyone: I just bought my first Exmark mower, M4815KA and need some advice/ help with changing the blades. Is there a place that I get get some help ? Owner's manual is not very good on the details. Need to know #1- Do I lean the mower all the way back on the handlebars, #2- What size wrench or socket should I use, #3- Do the bolts loosen counterclockwise or clockwise. #4- also what is the factory setting for cutting height ?? Thanks, I'm looking forward to using my machine.