XY Axis problem when assembling printer

i followed the manuell to the letter but still the axis moves very hard in x and y specialy when it is at the end of the print Surface not at the sensor well was tuff at the sensor to but i hade to do a 1cm pice and glue it there or it woulde just start jumping over the belt on the servo pls help i have tryied the align tool from thingivers but dosent seem to help

Its quite normal if you follow the manual, distance between clamps is not correct : have a look at this topic in the Wiki.