I just replaced my blades for the first time on my 61 inch turf tiger. I used Rhinoramps that I bought from northern tool. The ramps get my deck up high enough for the bolt and blade to fall completely onto the floor of my garden shed. I have an Ingersoll-rand cordless impact wrench 1/2 drive that I purchased just for this use. I was told when I bought the machine that changing the blades would require me to use an extension bar on my hand wrench to break the 15/16 inch bolts loose. Those bolts are at the top of the deck and are easy to get to for loosening. I did not like that so bought the cordless impact wrench, the best I could find. It's 20v 1/2 inch drive W7150. Anyway, ever since I have owned my turf tiger which is about 2 years now I have been putting a drop or two of 3 in 1 oil on the 15/16 inch nuts from time to time. About 3 days ago when I went to remove my blades it was a snap. Easy!!!. The light oil really helped. I put Oregon mulching blades back on because leaves will start falling soon and I will be adding my mulching plate and get ready for the fall leaves that will litter my yard. The only issue I had in changing blades was in putting the center blade back on. It was a stretch for me to run the bolt up through the opening and try and put the nut on at the same time. A helper would be nice but I don't have that luxury. I also have the blade buddy which is really nice. The manual calls for torquing to 75 foot pounds which I did not do. I just put the impact wrench on and let it tighten a bit. I figure it is going to tighten even more as I mow. Mackie is right however. The manual does say to tighten to 75 foot pounds and that would be the correct way to do it. I have a 250 pound sears torque wrench (purchased back in the 1970's) but too lazy to get it out. Maybe next time. It's for tractor use. Anyway this was my first experience. Hope this helps someone.