I have been looking at the X Axis mods on Thingiverse using the roller bearings and decided to take a different slant on the subject. I decided to try some linear ball race bushes as used on CNC engravers and routers. I managed to track down some 3/8 inch id bushes with an od of the exact size that fits the existing holes which are holding the plain bushes. The X table now moves as if it is floating on air. After seeing this result I intend getting another two to put on my Y axis.The bushes are such a snug fit that after a one and a half hour print there was no movement in them. If there is any movement of them in the future it will be quite easy to put a little touch of adhesive on them.