Mark, I too have an Agazzani and have noticed the thrust bearings seem to be more worn than the rest of the guides. Where did you find replacements?
I actually havent been too impressed with the guides. However, the saw cuts great and powers through everything so I shouldnt complain!
To the OP, when I was looking for a larger saw I really wanted an old cast iron saw but at the time I had too many irons in the fire so restoring a saw wasnt an option. I lucked out finding a B-24 just a few hours away. It was plug and play and was immediately put to use. First job it did was cutting tenon cheeks on a few doors builds for a historic house. I couldnt be without it these days!