Pictured is the 3d printed part HD-#45206 along side the old seal. As you can see, the diameter of the tool is not sufficient to reach the outer lip of the seal, leading me to assume this is just the wrong tool. I may draw up my own tool in SolidWorks and try to get that printed. Very frustrating. I know it's not a scaling issue because the depth of the installer is perfect, just deep enough to allow the sprocket nut to thread, just not wide enough. I assume this part is for older style tube frames and sporties, not for XB's. If anyone knows what the right part number is, please let me know. I hate paying for parts that don't fit. Grr.