So I was trying to drill a hole and used a 6mm drill bit. The hole was then 7.5mm, which I thought was strange, but maybe it was a long bit and spinning too fast. So through searching the calibration forums I checked the runout on the spindle with a dial indicator, and it (it being where the threads are, and again on the shaft of a 6mm endmill) varies by 0.2mm. The collet is from the elaire website, so that combined with the matching runout on the spindle threads, seems to be the spindle.
Does this make sense? I.e., are these numbers seen sometimes, or within normal range, or is there something I may be missing?