Just took my blades off this weekend and sharpened them for the first time. When I was putting them back on, I was wondering if there was a exact pattern on how the blades should go on. Is there a right way to put them on or any way that will help with air flow and grass dispersal under the deck? When I put them on, I put the left and right blades facing towards the front and rear of the mower. I put the middle blade on facing the sides of the mower making what you might say a T pattern between each blade. I did think thinking each blade, as they go around, will be equal distance from each other giving better air flow. I tighten them very well and they should not move unless I hit something hard (I look after I mowed and they were still in same place). I finally have my land rid of rocks so I should hit nothing now other than grass blades.