I recently had to have my bike fixed. It happens to be a Catrike 700. It turned out to be a series of repairs that took most of one day to finish. Because I like to find out how things work, I watched the very skilled and efficient repairman do his job. I was amazed at the number of specialized tools that the repairs required, including replacing the pedal shaft and the rear derailleur and the chain. You can probably tell why I have so many screwdrivers.