He used a correct. fr-1 to remove the freewheel. Thr fr-1 has wider splines, and the fr-5 has a greater OD.

Right, I went back and read the original post and he did indeed use the correct tool. The FR-1 and FR-5 are very close in spline diameter and width and can be used interchangably but, as you say, they are not a perfect match.