RE: No Warranty on HiTec Servo Gears!
Not so.
servo gears break from putting them in the wrong plane/linkage, or having a crash or flutter. In this case the customer is at fault.
However
They can also fail due to defective gear material. They may work ok when not under load (when you twiddle the sticks on the ground) but will not be up to the job in the air - hence the strip.