I have a torque wrench but have difficulty keeping the blade from turning while I'm using both hands to torque the nut. Tried using my foot to stabilize the blade while pulling on the torque wrench but that hasn't worked for me. I would prefer using the impact wrench with a torque limiting socket (not stick) but I guess they are not available in 5/16". EBay has one brand of torque limiting sockets but they only come in 3 SAE sizes. Someone mentioned using a 6 inch C-clamp holding some wood but you would think that there would be an easy tool to stabilize the blades.