Well I was just building a front wheel, getting down to the fine tuning here. I keep noticating that theres one place where i just cant seem to get it straight. So i get everything but this one spot true probably within .5mm is my guess, i bring the indicators in a little bit more and then the rim wont pass through on either side. I then look where it is, on the seam. Im using Sun rims which i am very fond of but i have seem defects in several, not noticable when riding. Has anybody encountered this or is it me?