Thanks to all for your input. As I mentioned in my post, I rented the Autozone tools but they were no where near the correct fit and design for the Maxima A/c compressor. I had better luck making my own clutch disc holder, and I got the screw off the end of the pulley just fine using that, but pulling the clutch disc off with Autozone's clutch puller tool was a joke - it's the wrong size and doesn't engage the inside of the clutch disc so there's no way to pull it off. I'll try again making my own tool per the suggestions. I think I need a long tapered bolt in the center of the puller which is small enough to fit in the center hole in the compressor. Then when the bolt is tightened, it should push against the center of the compressor shaft without actually engaging the threads of the shaft and release the clutch disc.