I have noticed that the centering on my Park TS-2 truing stand is a bit off - it has been that way since I purchased it. Is there an adjustment I can make to get it to center more accurately? Of course, I do use a centering gauge for wheel builds, but I also want the stand to be fairly accurate so that I only have to "touch up" the centering via the gauge instead of using it for the more gross adjustments.