Which cantilever to choose for re-tip

Why not call Ledermann and ask him about it? The carts are different enough could be one is more suited to one than the other. If anyone would know it would be him.

Just remember, it’s NOT going to be the same cartridge afterwards.

To your ears, it could be better, different,same or anything in between. It will be a glued on to the stub of whats remaining from the original.

I had a Sumiko Blackbird done with the ruby. I actually liked the presentation more than the original. I eventually crashed that one too. Moved on. My awareness to be cautious anytime I’m around the table, has grown since then.

Personally, I would save the $200, and get the ruby.

Dear @jsbail : With out doubt you must go for the boron cantilever. At the ened the manufacturer designer decided that those cartridge models gone with boron cantilever.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

If you are a klutz most definitely Boron. Harder to break. Millercarbon, stick with your Koetsu and get off that "jitter" merry-go-round. Ledermann could never tell what these cartridges really sound like because they "jitter" too much. Imagine that, fixing all these jittery cartridges so they can "jitter" some more. Lets call up Lewis Carroll and have a tea party. 

I would leave it up to Peter.  Both times I sent him carts he felt the best way to go was to just replace the stylus on the original cantilever.  And yes, he used what appears to be a blob of glue to attach it, but the carts sounded absolutely great when I got them back.  I can't tell you whether they sounded identical to the original, but I was very happy with the sound.