To fix my issue i put a piece of rod through the bearings, sat this across two parallels before clamping in a vice then milled tho surface off to the lowest bearings. I took off .8mm off from the largest to match the smallest and that looks like the issue here. I also had the same with the supports even though they were all the same one of the holes was not machined to the same height as the others. They were from different batches and this was evident in the slight colour differnce in the anodising