Actually I must admit Paul it does seem to be a different cast.As it has the mount for the edger (On the outside,for the bolt holes)and there are some long lines there.Here is one I have before I got it fixed.
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2015/06/full-5048-22083-bases_010.jpg)
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2015/06/full-5048-22084-bases_013.jpg)
So yes it does appear to be different indeed.
No long lines and no raised bits for the bolt holes.