On my ls400s(celsior) castor rod mounting plate it has 4 bolts one has been undone at some stage and i have only just found it i beleive the nut that the bolt screws into may of been welded in place and has broke free so it cant be tightened but my dilemma is that the nut would seemed too be boxed in between the inner guard and the wheel arch which doesnt look accesible any way too get too it or just holesaw through the inner guard?