thanks again guys.well spotted they are rere arms probably should have mentioned that
![Embarassed :oops:](./images/smilies/icon_redface.gif)
,sounds like its the cause of my problems (they really ought to ban idiots like me from using t'internet) ordered some unflanged bearings hopefully they will sort it, if not its gonna be dremel time
![Shocked :shock:](./images/smilies/icon_eek.gif)