I need to mention that two of the posts above are incorrect. The older Crown TSP with the four wheel suspension did have problems with rough floors. The TSP6000 is a 3 wheel design that runs as well on any turret truck on a rough floor. About finding someone to repair the truck, the biggest factor is knowing where the parts are on the truck (component location). The self dianostics on this truck are very good. The truck is much easier to troubleshoot than the older TSP and less training is required to work on the truck.