Ok after few days working on this problems , I finally think I have it sorted , I’ve changed the wiring to the motor and the limit switch , all juddering has stopped , except for a second when it goes to the far left , my prints are still coming out the wrong size by about 3-5mm smaller than it should be , and stretched , I’m printing a circle it comes out oblong , I installed new firmware on it the other day , put 7.5 on it , it now says replicator instead of creator , I’ve put a new pulley on the motor , all I can think is my printer thinks it’s a bigger printer with different size heat bed , I can’t understand why it’s doing it ha ha , any help be appreciated , Thankyou