I've never personally seen one fail, but have seen them with what appears to be hairline cracks in the plastic.

DMR in Japan sell a reproduction part, which appears to use an upgraded plastic material, but we've never actually used one, so that's the limit of my ability to comment.
_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.

Check us out on Facebook! Please "like" our page!