My '76 fuji track frame failed the "string" test by ~5mm - gap is 33mm right, and 28mm left. The bike rides okay, but when I look down at the front tire when tracking straight ahead, the back half of the tire isn't completely hidden by the down tube. I can see that I have to steer slightly (5mm?) left to keep the bike straight. Is this something I can mostly fix ala sheldon brown's "2x4" frame alignment method? Or should I give in and pay $$$ to the LBS? My front fork is straight and both wheels are dished correctly...