I think this is directed to Bird, Tin or Geir,
Did you guys have any issues with your LM8UU bearings? My LM10UU bearings showed up yesterday (identical to "standard" reprap linear bearings but 10mm instead of 8mm) and of course, I quickly had them on my drill rods to start playing with them. They are chunky and simply don't slide all that well. I have found I can rotate them around the drill rod and find a "sweet spot" but what ever I do, the are just not that friction-free feeling I was expecting.