A very good friend of mine was kind enough to give me the strong mount from his 650 thinking I could modify it for my 550. Although I could make it work, I wanted to see if anyone had the 550/universal mount that would rather have the 650 mount in trade. Now, this is just the two side panels, no hardware in exchange for the same. These have never been mounted or used, but it doesn't matter to me if the one I recieve has been, as long as there have been no modifications to it. E-mail me at firstname.lastname@example.org or reply here.