CQGLHyperion I feel ya. I ran into almost all the problems you did (including ripping the tape off the bed, that I too thought was just protection). Those replacement bearings need new carriages built to hold them. My design is somewhere in this thread. If you're talking about the LMU88s. Good luck with it man! I've got mine printing at around 120mm/s but I am having problems with jamming. I think it's a combination of the extruding motor being a bit stressed from being jammed so much (I replaced everything else but the motor) and the actual nozzle being messed up from a little too much from over exuberant cleaning. Once I get those little details happening I think it will be fine. I've mentioned it earlier in the thread I think, but the Ikea Lack table hack is really good to keep this printer stable (which is the reason I can print so fast).