swapping out the blades on my Timecutter 42" (75742) and the manual says to torque the blades on between 60-80lb. I have a torque wrench and was only able so far to get about 35-40 lb of force laying on the ground with one arm (other one holding the blade). was gonna try the wood block trick or throwing on one of those arnold blade removal tools to hold the blade so i can put some more force behind the wrench. curious how many lb's everyone usually puts on their blades w/ this series to be safe