What else is going to fail on my new Ariens Apex 52" Zero Turn Mower?

It is a powerful, supposedly well built, expensive machine in the $7000 range when kitted out. I got it last year and at only 37 hours the power takeoff, PTO, electric clutch fell off the engine while using it with the blades spinning at 2–3000 RPM. Lots of noise, lots of banging! I called the dealer and they picked it up, took it away, and after about 3 weeks, returned it. They said a shorter bolt was installed at the factory and that limited the number of threads holding the main bolt on. New bolts, new PTO clutch. All fixed. No charge.
Now at 54 hours, while using it, the left wheel fell off. It was lucky the machine did not tip over. The wheel had holes larger than the lug nuts holding it on. I called the dealer and they said this has happened before and they will come out to my place to fix it: replace wheels studs, fender, tire and wheel. It took 10 days for parts to arrive. I assume it will be fixed shortly. Again at no cost.

But! What else is going to break or fall off this fantastic mower?
What’s next?