The spinning bolt thing is normal, both mine did it, it's now held on with 2 SS bolts and nuts, 10 mins work with a file to file away a edge of the support so a nut can be pushed up between support and bumper inner and the SS bolt goes right through the lot(need to cut bolts to size, but SS and coppaslip = no more problems.
I saw Southend on the tv last night with the boy racer program, was hoping to see some ladies but no luck!!
tabetha