DetailsFrom triangle lab - kit contains what you need to smooth 4 steppers (e.g. x,y,z,e axes) Remove zebra stripes! Works on many different stepper drivers. Explanation of how it works is here: http://www.engineerination.com/2015/02/drv8825-missing-steps.html?m=1 This doesn't remove every issue with your printer but it fixes a problem where one or two microsteps don't move the stepper. Typically every 16th step is lost and then the next step moves twice as far.