Could not be bothered reading this whole thread with all the posts. Word on the rails is all the Waratah cuplinks are to be replaced with Aussie BHP steel unit as the Chinese ones are showing cracks and fatigue.
*Fist Pumps the air.
Sorry, but you could not be more wrong. They are not showing signs of cracking and fatigue, the issue is one of installation, not of materials.
Oh and by the way, the couplers aren't even Chinese. They're manufactured by Voith GmbH in Germany. Might wanna check the credibility of your sources before you post these sort of rumours here.