Omg now this is embarrassing ... Just spent morning under bus to locate and try to sort knocking noise out ... Rechecked all sads and cradle donut ... All exhaust .... All fine ...got mrs to start bus to try locate noise there was a banging right in my ear I moved around underneath the bus asked her to start again and low and behold ... There was a socket under engine mountain ... Don't Know whoever could have left that there
bloody nearly 3 months of knocking noises and all that labour redoing sads and aligning .... And some Dosey plank left his socket there
well on a good note all quiet now lol
and I found my 12 mm socket
happy days