Thanks William, you are probably right about that it's bolted on when digging
![Smile](images/smilies/smile.gif)
It's true that excavator this big does not change job site so often that the bolting it solid is not too big of an issue.
Actually this information made my life easier
![Big Grin](images/smilies/biggrin.gif)
, that is if I make it permanently wide.