Report as inappropriate

I am attempting to put this together and the X-Y mechanism of the gantry seems pretty stiff. Everything seems to move OK until I get the belts and carriage on and then the mechanism seems a lot tighter than what I have experienced when building the Prusa I3. Can anyone comment on how theirs has turned out? I have not applied power to the motors yet, but I am concerned about their ability to turn the shafts.