Did you ream the Y carriage holes for the X rods with an 8mm drill as this may be due to not having the X rods fully home in their holes. I suggest you go through the X and Y axis commissioning again as well.
Hammy is haveing his scrape. i cant get mine to fit inside the box. I have reamed out the holes. do you think i should let the bit go a bit deeper in the hole?
The rods need to go in almost all the way. Check the depth of the hole with a small rod and mark the rod, then check how far in your reamer goes, if not as far then dig deeper.
Bit didn't go in as far as rod as you mentioned i should do. dug deeper, then with some force put rod into hole. only to have the rod bust through the back! Thanks E3D for sending me a new one!