No, I used skewer, tool held in place well and threads were greased when freewheel was installed. It was NOS when I bought it so hadn't been used. It was just on really tight and tool sheared through body when I applied force, which I gather isn't all that uncommon. After I posted, I came across the following on the Sheldon site, "It was very common for the prongs to get rounded off or broken, and to ruin the freewheel. Once the notches are damaged, or to remove and discard an old freewheel for which you have no tool, you must disassemble the freewheel and clamp the core into a vise -- left side of the wheel up -- then unscrew the wheel counterclockwise."

Obviously I managed to get off using tool and so it may be possible again, but it was not easy and I am not sure it would work again. Because only two prongs of the tool engage, the tool doesn't apply even force around the body so if freewheel works on really tight while riding, I may not be able to apply force needed to remove. That said, good to know from both the link acrowder posted and the Sheldon site that there are options for removing freewheel even if tool won't work.