A forming tool for use with a bone preparation device to form an opening or shape in a bone such as for example an opening for an augment of an orthopedic implant device. The forming tool can include a guide slot that extends through an outer wall of the forming tool the guide slot being symmetrical or asymmetrical in cross sectional shape. The guide slot is adapted to axially receive insertion of a guide that can be structured for placement in an intramedullary canal of a bone of a patient. Additionally the guide slot can be sized to accommodate linear angular and/or rotational displacement of the forming tool about the received guide in a manner that can offset at least the position of the opening formed in the bone relative to one or more reference axes.
