Yeah i know, i am glad now tho!
I just thought i had it all sorted, and went to show dad what happened with the missing bush - when i notice that it (mower) rocked side to side as if it were not sitting evenly on the rollers. Well it wasn't, the front roller framework was bent as well, like the adjuster had been forced at some stage and the rod was all bent up. Just had that straightened by one of the engeneers at work. phew, hopefully now it is all good.