u get wat u pay for. Bosch started making everything in China 3 years ago.
When it was made in Germany, it was aprox 1 per cent fail rate on detectors and low end stuff and u would see a inspected sticker every fifty pieces.
now, you see inspected stickers on everything, and I mean everything, and the fail rate is zero realistically. If something isn't working, its usually the tech in Australia who installed it incorrectly.

The chineese want to keep contracts, hence the extra effort. 99 percent of stuff is made extremely well these days.
(if the products design is strong, the end result will be the same n so on.)

Go the Chineese. Thunderbirds are Go ! (p.s - nice machining Mike, wish I knew what it does).