I had a moderate case of upgrade-itis this past winter. I switched my Shimano Deore components to Sram X-9 among adding a new fork, upgraded to better hydraulic disc brakes, etc. My bike was originally an 8 speed and now it is a 9. The new components all work excellent and it shifts like a dream compared to the old Shimano stuff. Well, I just remembered that freehub bodies are 8 and 9 speed specific. I have ridden the crap out of my bike since early spring and have had no issues what so ever, but now I am concerned I should have also swapped the freehub even though the 9 speed cassette fit just fine. Is this something I need to address right away or just leave since it seems to be OK?