Ok, so the company I work for, they rebuild their rides yearly, replacing parts, not because of any defects, but because they keep things in perfect working order. They upgrade safety features when they become available from the manufacturer, and ensure that all maintenance procedures are undertaken regularly. Checklists are done daily, greasing of moving parts, and inspections of motors, gearing and other moving parts are all reviewed before anyone boards the ride for the day. Checks are also done at night after close. Once the ride has been packed and returned to the yard, usually towards the end of the year, parts undergo screening and rebuilds take place if necessary, Manufacturers keep owners up to date, and I know that KMG are extremely prompt in offering service. Mondial also offer 24 hour service, and some of their newer machines feature a connection that shows the ride is currently running, and if any problems are found, they can assist immediately.
I'm honestly not trying to fight you on this. Everyone knows the love I have for travelling rides here. Just like the Rainbow, that model in sweden was involved in an accident, HUSS made sufficient changes to ensure the safety of the public, and they move on.