On my 2001 Lazer 25/60, 250hrs, I was putting a new set of blades on the other day, when I noticed I couldn't get the blade on the trim side to torque down. Even while the blade was blocked with a piece of wood, the spindle would all turn not allowing the nut to torque. I ended up putting a wrench on the nut on top of the pulley to hold the spindle and that allowed the nut to tighten all the way. I know it says in the manual not to do this... I'm thinking possibly the threads in the spindle are slightly damaged? Although the bolt easily tightens, right up until I try to torque it to 120 ft lbs. I ran the machine for about a half hour and there is no noise or vibration, and the bolt stayed tight. I ordered a new spindle and am thinking about getting the housing w/the bearings, but I would like to be sure if I really need this. Any thoughts would be appreciated. Any concerns w/running like it is?