I just bought another lawn care company and in this acquisition was a Gravely Pro Turn 152. The trouble I'm having with it is the grass not being thrown out hard enough. I am using the standard Gravely blades like the attachment. I have tried different kinds of blades to see if that will help and it didn't make much of a difference. Now, please forgive me but I'm just not that experienced with Gravely so any advice is greatly appreciated.