Not sure how that lower bushing tool works. Would have been nice to have something for that. I did mine with welded washer and beat the fk out of it method. lol.. I made a tool for uppers- same idea as theirs. Worked good, but for all the messin around to get the right pieces that one looks like a good deal. I did buy a socket from Summit at about half that cost, but that was a few years ago.
