I have had a Powerain since 1994 (they originally called it the "Husky"). I think I have seen everything that can possibly go wrong with these units. With regards to the tracks, I have taken the nuts off by heating them with an oxy-actylene torch and then re-shimmed the tracks using a rotating laser. I used heavy galavanized washers and used whatever was required to bring the track level (except for the first section, you really DO want a SLIGHT downslope to the home position). After you bolt the track down, you'll have to re-check and add/remove a washer here and there. Once it is all done, rent a gas-powered welder and weld the joints, and then grind them smooth. Eventually you'll develop ripples in the track that will make the machine shake and vibrate and damage the lights and other components. The long-term solution is proper bedding for the tracks (never done) and one piece tracks (last time I checked it would cost about $1,000 for each). It will still develop the ripples because of the massive load and inherent slipping. Pointless anyways, because by then every piece of plumbing will be corroded beyond repair and whole sections will have to be torn out and replaced. I have replaced every hose, bearing, swivel (many many times), motors (yes every hydraulic motor too), many signal lights, and pumps; along with countless photo-eyes, proximity sensors and 1 baseplate PLC. I even have my own handheld programmer and have my "custom program" saved on a memory card. I shutdown my automatic bay last spring and don't know if I will ever reopen it. It never was very profitable (made about $1.50 on my top wash - which sold for $5). The most washes we ever did was about 12,000 in 2001 and by 2006 we were only doing about 4,000 per year. The wash sits still now with about 80,000 washes on it and it is wore out. There are some fundamental design issues with these washes that I find life-limiting. You may conquer the track issue only to run headlong into the next.