FIG. 6A shows a die (70) with grooves (72) that may be used to guide a scalpel or other cutting instruments to trim a graft (6) placed within partial bore (74) to achieve any of the graft configuration shown in FIGS. 6A-6C. In preparing the graft end configuration shown in FIG. 5B, a first cut is preferably made at a 45??? angle to define the open heel (64).