So, did some defrags and another sdelete, when trying vmkfstools -K it does this:
/vmfs/volumes/4ee2394e-69bbfe1d-ccd5-1cc1de6ce910/HD-SQL-02 # vmkfstools -K ./SQL-02_1.vmdk
Hole Punching: 2% done.Could not punch hole in disk './SQL-02_1.vmdk': Function not implemented
Which i have no luck looking up. using vmkfstools to clone the disk to another volume also does not shrink the disk, stays the same size.
Converter will shrink it, leaving me with a 19 GB thick disk that i just clone to thin, that's what i did with the last VM also.