I have a Progressive suspension rear shock fitted, which I installed new myself 10,000km ago. I was refitting the wheel after a tyre change last night and as I was torquing the axle nut, I noted the swingarm was able to lift up by a few mm. The freeplay is coming solely from the top shock mount. I checked the top mounting bolt and it is tight, so I think the freeplay is either between the bolt and the shock bushing, or between the bushing and the shock top eye. Is that normal or do I need to get into some remediation?