Hi guys.... I have about a 12-13 year old 3 hp Delta Unisaw. I've always have had some sawdust coming back off the front of the blade. I know fence is parallel to the miter slot as I set it with a dial indicator. I put a Master Plate on the shaft and run the dial indicator along the length of the 8" plate. I zeroed the indicator over the shaft and took measurements front to back. The reading is telling me the trunnion is skewed a total of 4 thousands (2 forward and 2 back of the shaft). I've never attempted to adjust this saw before but finally getting tired of eating the dust. Has anybody done this chore before? Is it a real bear to do? Big question, am I just being too anal about the amount the blade is skewed to the table?