i just put some MM 4-bolts on bout a month ago. installation was easy. instructions were good. Very nice quality pieces. They come with everything you need. all mounting hardware and stuff are there. The only thing that you have to save from the original CC plates is the top not and the plastic dust boot. I love the fact that they are totally independent adjustablity of caster and camber. My alignment guy told me that aligning my car was the best and easiest car he's ever had to do. I don't know if i'm all set on aluminum plates either. just doesn't seem as strong and it is holding the whole engine and front end off the ground.
I might be the only responder who has had both 4-bolt models.
They both work fine, but Steeda is quiet on all but severe bumps, MM is not.
You want my MM take-offs?