Sbrown ... that's an interesting bit of info. I've been reading a lot of good comments about Andy.
My primary cartridge is the Lyra Kleos. Not sure, but it may have a micro ridge stylus. I'll check. I seem to recall that Jonathan Carr, Lyra's designer, posted a comment some time ago that said changing cantilever's on the Delos and Kleos is NOT a good idea because the damping system is configured with a boron cantilever in mind.
Seems to me that if Andy can closely match a replacement stylus with the original, it might bring a worn Lyra back to life.
Sorry to talk about Lyra cartridges when this post is about Benz cartridges. But I think the retip quandary is very similar.