Quick question for you guys. I am planning on renting a RYAN aerator this week to do some aerating and over-seeding. I know to mow before aerating but how short do you cut? I cut most tall type fescue awns at 3.5", 3.75" and sometimes even 4" inches. How short should I mow before...around 3" maybe or just at normal cutting height? What do you guys normally do when aerating fescue? Thanks in advance.